A wireless control system consists of 2 components, the transmitter you hold in your hands along the receiver you place within your drone. Dramatically simplifying things here, your drone transmitter and radio receivers will examine your rod inputs and ship them via the atmosphere to your receiver at close time.
When the receiver gets this information, it moves it on to a Best Drone Transmitters Review that makes the drone transfer. The radio may have four different stations for each management on the sticks and some additional ones for almost any auxiliary buttons.
What to look for in an RC Transmitter
It can be difficult to choose the right drone transmitter, especially for beginners. The many price tiers available can overwhelm you with the sheer number of features and specs that are available.
It’s easy if you understand what you’re purchasing. Before you buy one, here are some things to consider:
The mode of a drone transmitter refers to how the controls are laid out. There are two types of controllers: Mode 1 and Mode 2.
Mode 1 remote controllers have throttle, roll, and pitch/yaw buttons on the right joystick. This layout is preferred by Australian drone users.
This layout is slightly different for Mode 2 remote controllers. The right joystick controls pitch and roll while the left joystick controls throttle and yaw. This mode is used by most drones in America, even toy drones.
There is no right or wrong layout, but there are your preferences. Mode 2 is the best choice if you are still trying to decide. It is used by a lot of people in the US, so you can find a lot of help online for your piloting.
2. Gimbal Quality
The camera gimbal is not what I am referring to (which is an entirely separate thing). The controller’s joystick, which is the correct term for gimbal, is what I am referring to.
You’ll be flying your drone primarily using them so make sure that the gimbals are great and you’re happy with them. The tension can be adjusted to your liking, so ensure this feature is on your drone.
You also need to decide whether you prefer to control the gimbal with your thumb only or by pinching it. For pinchers, a longer gimbal is more convenient and easier to use. Tweens using their thumbs will prefer a shorter one.
Gimbal responsiveness is important as it will affect your piloting. Advanced gimbals have magnets that can detect the stick’s location. This technology provides a better user experience and longer-lasting durability.
You will be using your drone transmitter for a long period of time. It is largely a personal choice.
There are many factors that affect how comfortable a controller feels. For example, if you have larger hands you will need the transmitter’s shape to fit your needs. You might prefer a lighter controller to not wear your hands as much over extended use. But you will be amazed at how many people like heavier ones.
It is a good idea to test a controller before buying it. You’re likely to like the other controllers if you have used one from a brand.
4. Model Memory
As mentioned above, an RX unit must be bound to a TX device so it can only receive commands from the transmitter. This is done to avoid interference from other TX units. An RX unit cannot be paired with more than one TX unit.
A TX unit can however be bound to multiple RX units. This allows you to control multiple drones or RC cars and planes with one transmitter.
This is actually a great way to manage a large drone collection. You don’t have to micromanage each controller for every drone, which can be time-consuming. Instead, you can just take care of one transmitter.
But you must remember one thing: you need to know what RX setting on your transmitter corresponds with which drone. Advanced transmitters make it easy with the use of model memories.
This automatically saves your drone’s profile so you can simply choose and load it when you fly the drone. Many transmitters can store up to 20 drone profiles in memory. Some can even be extended by using an SD card.
5. Voice Alerts
Piloting is a great way to keep your eyes on the drone or the road. You must also keep your eyes on vital telemetry data such as signal strength and battery.
This is particularly important for drone racing. A race can be lost if you are even a fraction of a second from the track!
Voice prompts are the answer. You can program these to notify you when certain thresholds are reached. You can program your voice to alert you when the battery is low or it’s time for you to land.
This is not supported by all transmitters, but it should be. This can help you have a more enjoyable and safer piloting experience.
6. Battery Life
Although it is not as important as battery life, it is an important consideration for radio transmitters.
Anything with 5-hour battery life or more is acceptable to me. This will give you great longevity. It’s unlikely your drone’s battery will run out, provided you bring it in fully charged.
You’ll find a wide range of battery configurations and transmitters for drones.
Many of these don’t come with a battery, so you will need to purchase your own. You might consider investing in rechargeable cells to save money on batteries that can get expensive over time. Although this can be an additional expense, many people find it worth it to have the highest quality battery possible.
It is possible to put the battery in the transmitter and charge it via USB. This is the ideal setup. Although this is convenient, some power users dislike the idea of having a limited battery.
It really all depends on you.
7. Frequency And Channels
Thankfully frequency and station shrewd radio controllers are a good deal more affordable than their FPV counterparts and are a lot simpler to handle.
Video transmitters and recipients require placing the appropriate channel together with diligent channel direction each time you fly. However, a Radio Controller only must shuffle or pair using a receiver when it is the first installation.
From then on, it’s going to always link and jump over different frequencies in the 2.4Ghz band to make sure a helpful link with hundreds of pilots working at precisely the exact moment.
8. Range Technology
The range’s limitation is generally when the recipient can hear what the transmitter does and typically drops from the 1km array in normal states. Imagine trying to Speak to somebody across a field. A few variables will determine the Assortment of your radio connection:
- Your transmitter’s output – Lots of operating just under the legal maximum to comply with global standards.
- This Receiver’s sensitivity – Even a more sensitive receiver is similar to getting a more significant hearing. The sign will travel farther; nevertheless, it might pick up more sound in certain conditions.
- The caliber of your antennas in both ends – Antennas can be a whole post in there, but essentially, a giant antenna will deliver and get a better sign. Often optimizing your antenna positioning is likely to create a massive difference in the operation of the machine.
Although typical radio methods use the 2.4Ghz band, long-range expert systems like the TBS Crossfire can operate on lower frequencies that can travel much farther in precisely the same power.
Top Rated Best Drones Transmitter Brand
1. Taranis X9D Plus – best RC transmitter with telemetry
The FrSky Taranis X9D is a beautiful radio. Here is the radio I use, and that I would not use any radio. For $200, this radio packs features that you would need to pay far more for.
The Taranis includes Open9x firmware, which is quite potent and programmable, so you’ve got control over every small role it might appear overwhelming at first, but two or three months into the hobby, and you’re going to get comfortable with all of the bells and whistles.
Every element of the radio may be customized. You do not need to personalize it to function; however, you can like to.
It supports up to 64 models and may also be utilized seamlessly using a computer onto a simulator.
The sticks (gimbals) are similar to butter in smoothness. They are never watertight, and it is easy to move them around with no situation.
Where the radio shines is that the switches could be assigned to any station you desire. Together with different radios, the stations are fixed stations. You can always stick up X. Channel 2 will be stick down X, and so forth. From the Taranis, you can program every station to be whatever change you want.
Therefore, if you’re more comfortable flicking the switch on the left-hand side to trigger your failsafe, place your station to that change. Should you want another one, put it.
The scope can also be incredible that the radio system FrSky utilizes gives you 1.5 kilometers of content, which can be more than sufficient for both racing and aerial photography.
The Taranis can be offered in a distinctive Edition with a carbon fiber pattern casing, upgraded M9 gimbals, and the antenna mod completed in-factory.
Read more: Best Drones With Camera
2. Taranis X-Lite
The Taranis X-Lite packs most of the killer features of this X9D+ (such as good gimbals and OpenTX) but is a lot more streamlined and less costly. It is very tiny, about the size of a PlayStation or Xbox controller, making it super easy to throw into a backpack and go pretty much everywhere.
It is advertised ideally towards mini quad pilots, but there is no reason you can not fly a fixed-wing with this.
3. Taranis Q X7
The Taranis QX 7 does pretty much anything Taranis X9D can, except it is more economical, almost half the cost. Ok, that is an oversimplification, but it is a budget Taranis X9D you won’t outgrow as readily as some other radios.
The couple things missing from the QX 7 tend to be more suited to airplanes, anyhow, so as long as you’re flying multirotor and easy planes, you genuinely don’t require any radio apart from this. Had I become the hobby at this stage rather than earlier, I’d have gone to get this radio.
Read also: Best Racing Drones
4. Turnigy 9X
The Turnigy 9x (also referred to as the FlySky 9x) is an eight-channel radio. It is a misnomer! The Turnigy 9X was my first radio, and while it functioned well to begin, I quickly outgrew it and updated it to a Taranis.
The most considerable benefit of this 9X is that it is a good radio and costs only $60 (plus delivery, coming from China). So for half of the expense of a Taranis, you might begin in the hobby.
Sticks on the Turnigy 9X are great, but you’re stuck with whatever stations every switch is delegated to. Additionally, there are just two three-position switches, so some individuals can discover that restricting.
To utilize the Turnigy 9X using a simulator, you’re going to require a special USB dongle that plugs into the sound out port at the rear of the transmitter, as there’s no more USB plug.
I love this radio because there’s a good deal of scope to update it and add more features as you want them and develop into them.
By way of instance, though the receivers which are offered for this particular radio are PWM-only and using a full assortment of approximately 500 meters, the module at the rear of this 9x is swappable, so if you eliminated the inventory Turnigy module also added that a FrSky DJT module, then you can utilize PPM receivers using it today.
Suppose you discover the firmware instead of limiting (and besides selecting/creating versions and correcting inputs, there is not much else you can do). In that case, it is possible to flash a more sophisticated firmware and include more performance.
In case you have the firmware and the DJT module, and you’re searching for a few delicate soldering, you may even empower telemetry (which isn’t natively supported).
So while the Turnigy 9x is a slight restriction to begin, it does the work for fresh entrants to the hobby that is unsure how severe they are. With the capacity to update, it is possible to unlock more prospective gradually.
But considering the radio will probably cost you approximately $70 including transport, the DJT module is about $40, including shipping. You have spent $110 and gotten half of this Taranis’s performance.
In the conclusion of the day, it is your choice if you’re going to be content with the cheaper, more restricted radio (your flying won’t be changed. You can just as skillfully fly using a Turnigy 9X or some FrSky Taranis) due to funding constraints when beginning out or shelling out the excess money now and employing the Taranis for quite a while.
Read also: Best Long Range Drones
5. Radiomaster TX16S
In my view, the most flexible and best value radio ever produced must be the TX16S. It’s a multi-protocol module that supports virtually every protocol in the pastime, and it also wholly compatible with Crossfire. The full-size hallway sensor gimbals provide you with a complete assortment of pole traveling and superb precision.
6. TBS Tango 2
It is highly portable and with fantastic ergonomics. By TBS, the Tango two includes high-quality full-size gimbals with fordable sticks (just in the pro version), which is very good for transportation.
It’s built-in 900MHz Crossfire modules using maximum audio speech outputs of 250mW. It runs OpenTX, has built-in USB charging. And it is created by TBS, the newest you can expect when it comes to quality.
However, it does not encourage 2.4GHz. Also, it does not have any external module bay. You’re virtually secured to TBS’s ecosystem. Plus, it is not suitable for the wing and airplane flyers, it does not have sufficient switches/sliders, and there are no trim buttons.
See more: Best Drones For Travel.
7. Frsky Taranis X9D+ 2019
In the event, you would instead utilize Frsky’s most up-to-date ACCESS protocol. This is the best transmitter they’ve ever used. The Taranis X9D+ dominated the RC hobby for several years before the less costly T16 arrived along. Frsky renovated the fantastic old X9D+ using brand new hardware and protocol in 2019.
8. Flysky FS-T6 6CH R TX for Running Drone
The transmitter has lots of controllers with no unnecessary bells and whistles. Its programmable parameters encourage a variety of craft such as helicopters, gliders, airplanes, and drones.
There is a large backlit LCD that shows easy-to-read fonts and simplified menus. Programming functions comprise graphically portrayed throttle curves and expo to create straightforward changes.
The TX physical specs comprise the following features:
- Easy-grip handle
- Switches A-D
- Knobs A-B
- Left/right trimming
- Left/right joystick
- Hook up
- Input (press)
- LCD Panel
The transmitter may save up to 20 versions in a time, signifying one control to get a fleet of craft. The product boasts low power consumption and higher receiver sensitivity. The intelligent design and effortless handling make this intuitive TX utilize and configured for private usage. There is a choice to take a 1-year guarantee on the product for people who desire the cover.
Worth noting is that the magnitude of Flysky’s FS-T6 6CH R TX. It is not likely to be too comfortable to manage if you, by chance, possess a below-average-sized hand son.
- Multi-aircraft service
- 20 version supports
- Low power
- Large screen controller
- Intuitive controls
- Simplified menus
- Size awkward for smaller hands
9. FlyskyNV14 14CH TX w/ Touchscreen
The unusual design is the first thing drone pilots detect together with all the Flysky NV14. It seems more like a gamepad controller compared to a traditional aircraft transmitter. It’s that also.
However, what surprises many people is how it matches the palms, just like a well-tailored glove. The distinctive ergonomic design displays comfortable shapes and intuitive and sleek, smooth, exact hallway gimbals.
Flysky’s NV14 includes two receivers, a tiny single one, and also a giant dual antenna. The apparatus has 32 controls found on the front, shirts, and buttons in the back. It seems overwhelming, but it is not. This transmitter is an excellent pick for thumbs and pinchers.
Everything functions and most say that the NV14 is the ideal transmitter they have ever employed. But, there’s space for improvements. The problem isn’t the hardware. It is from the beta firmware that is buggy. There are consistent updates, however, so this criticism will become obsolete before long.
- Intuitive gamepad design design
- 3.5″ color touchscreen
- 14 stations
- Hall sensor gimbals
- Unique finger grips
- Two recipients
- Back switches
- Collapsible Omni antenna
- Incomplete firmware (beta)
10. Spektrum DX8 TX w/ 250 Model Memory
There is a lot to enjoy and lots to research using the Spektrum DX8 radio transmitter. The voice alarms are a wonderful touch that allows pilots to listen to information reports while viewing the craft.
It is possible to program audible alerts also. They could call out things such as the present flight manner and report telemetry information on demand. Another neat feature is that the transmitter’s 250 version memory capability.
There are far more aircraft programming features than you can shake a stick at. Pilots get to select between RC planes, helicopters, sailplanes, and multirotor. The multirotor station inputs comprise ALT (Altitude), ROL (Roll), PIT (Pitch), and YAW. The Exotic Flight Mode Setup and Change Movements make light work for drone pilots.
The built-in telemetry is a quality that provides out essential real-time information. Some instances include airspeed, altitude, signal quality, engine temperature, and battery endurance, etc. The Wireless Trainer Link can be worth noting and exclusive to Spektrum transmitters. It works by allowing DX8 users to join with other Spektrum TX’s and compatible Spektrum FPV headsets.
The Spektrum DX8 TX is user-friendly on a superficial level. But, there is a lot more to research if you would like to exploit its complex features. Nothing could be too hard if the User Guide were detailed and straightforward, but it is not. It is too obscure.
The fantastic thing is that YouTube has lots of authentic user tutorials and testimonials. Online vids do a lot better job than the organization’s so-called manual anyhow.
- Programmable voice alarms
- 250 version memories
- Multi-craft programming
- Built-in telemetry
- Wireless coach Connection
- Vague manual
See also: Best FPV Drone Simulator
11. FrSky 2.4G ACCST Taranis Q X7 16CH Transmitter
The Taranis Q X7 is a feature-packed, lightweight radio program using a backlit LCD. It’s a 60-model memory that is extendable still further utilizing a MicroSD card. The real-time flight info logging is a given at this level. However, a few other features are a surprise. The Haptic Vibration Feedback System provides an alternative to audible and voice alert warnings.
Additionally, audio speech outputs rely on preferences, alerts, and worth, etc. Another welcome aspect of this 16-channel radio is its easy quad ball-bearing gimbals.
The physical controls comprise 6 buttons and two knobs. Firmware updates to the machine are painless with all the device’s USB ports. The interface also makes it effortless to link to a standard PC to correct a variety of settings.
FrSky’s Taranis Q X7 utilizes spring-loaded sticks, which automatically return to center positions. They make shifting between modes two and one a cinch. Additionally, it is a straightforward job to remove the springs if you would like a static throttle.
Pilots can navigate the backlit menu with the center button and easy wheels. Along with also the Q X7’s total telemetry capacity is just one of its standout features.
The business believed it’d be a fantastic idea to allow the end-user to pick their battery life choices. This, they say, is the reason the FrSky Taranis Q x7 does not include batteries or possibly a battery. It is a wrong move and appears to be a substantial frustration heading by the consumer opinions.
- Bright backlit LCD
- Extendable Model memory
- Real-time flight information logging
- Quad ball bearing gimbals
- Sound address sparks
- Vibration alarms
- Super Low Latency
- Battery not included
12. Radiolink AT10II 12CH RC Transmitter/Receiver
The significant elements of any drone transmitter would be its management and features. Bling ought to be the very last thing on the listing. However, the Radiolink AT10II has lots of whether you need it or not.
Well, it is as complicated as it seems and boasts a super-fast reaction time of 3ms for 12 stations. The control additionally keeps stable control while hopping frequencies in urban environments.
This radio boasts exceptional ergonomics and sport several buttons. It’s 4 two-gear switches, 3 three-gear switches, 5 VR switches, and a reset trainer change. Its intuitive navigation menu is also super simple to follow. The next-step configurations imply users do not even have to refer to this manual.
Alerts are a crucial quality of quality transmitters, and this one has lots of those. There is a minimum voltage warning, a minimal RSSI alarm clock setting, and many other people to boot.
The backlit LCD additionally utilizes DD sounds and phrase alerts so that pilots do not miss crucial warnings when it is noisy. Along with the real-time information, telemetry provides customers with all the observable safety required.
Telemetry includes critical data like speed, distance, scale, voltage, and real-time yield latitude. Users may upgrade online with the USB cable to make sure they have the most innovative installation.
The joysticks are a letdown regardless of the otherwise unique build of the TX. They work well. It is just that they feel flimsy and out of line with the remainder of the unit. Another buyer drawback is the Radiolink AT10II has small user opinions in contrast to a few versions.
- Super-fast response time
- Several alarms
- Real-time data telemetry
- Several switches
- Online updates
- Extended battery life
- Flimsy joysticks
13. Spektrum DX6E 6CH Multi-Purpose Transmitter
Spektrum’s DX6E is an excellent choice for novices and seasoned users alike. It is a flexible TX with programming features such as airplane, airplane, helicopter, and multirotor.
The ergonomic layout and a sleek black casing add to its feature-packed allure. It comprises 4 two-position switches, 3 three-position switches, gimbal spring configurations, and a wireless coach connection.
The built-in telemetry provides real-time information, including battery voltage, signal quality, and even more. Additionally, it is possible to program alerts for if telemetry worth reaches their predefined limitations. This TX includes 7-point throttle curves for airplanes and helis and 7-point pitch & tail curves for copters.
There is much more to enjoy with all the Spektrum DX6E 6CH than there is to dislike. It will have a few issues, however. The product includes 4 AA batteries, but it is power-hungry. Most savvy users will invest in rechargeable cells. Another gripe is that the guide is overly vague in some areas. The manual is sufficient for experienced users, but novice pilots find it lacking in certain areas.
- Fantastic Price
- Ergonomic design
- Share version setups along with other Spektrum TX consumers
- Generous version memory
- Wireless coach Connection
- Built-in telemetry
- Programmable alerts
- 7 airplane wing kinds and 6 tails
- 7-point throttle curves (plane/helis)
- Manual too obscure for novice users
14. Radiolink 2019 T8S
- 8 Channels
- Distance: 2 km (without any obstacles).
- Weight: 141g
- Battery life: 5 hours with a built-in 900mAh 1S lithium battery
- Radiolink R8EF and R8FM receivers, Radiolink R8F, Radiolink R8F, Radiolink R8F, Radiolink R8F, Radiolink R8F, Radiolink R6FG, Radiolink R7FG, Radiolink R4FGM receivers
- Dimensions: 6.37×3.76×2.24 inches
The T8S looks like a console controller but doesn’t have a finger grip. Because everything is easy to reach, the T8S can be used by children. The T8S is also very portable and can be carried in your child’s pocket.
It is easy to understand the controls, which makes it easier for children. Gimbals are easy to use and glide effortlessly. Gimbals can even be removed.
This being said, users will find the buttons and channels available on the radio transmitter lacking.
The T8S is a very responsive transmitter, despite being an entry-level model. Our personal tests have shown that FHSS technology gives it some anti-interference.
The T8S also has a rechargeable battery, which is a big advantage over most other radio transmitters. You get 5 hours of operation time which is enough to fly multiple flights with your drone. The USB port can be used to charge your drone.
It doesn’t include a receiver and must be used with an existing receiver. This makes it easy to pair the T8S with the receiver. You’ll have to limit the number of drones you can use with the radio transmitter.
A smartphone app allows you to adjust the settings and parameters of the T8S. It is easy to connect via the USB port. This is also a way to upgrade software.
The Radiolink T8S is a great upgrade for your hobby drone or toy. Your kids will love the simple setup and easy-to-use interface.
- Ergonomic design and compact
- Affordable price
- It is easy to set up
- Responsive Control
- No receiver included
15. Turnigy Evolution 8CH AfHDS 2A RC Transmitter
- Weight: 0.7 Pounds (0.3 kg)
- Size: 0.7×0.6×0.3 Inches (1.8×1.6×0.8 cm).
- No. No.
- Model Memory: 20 Models
- Protocol: IBUS/SBUS
Turnigy Evolution, another great newbie drone transmitter is also available. It is, like the FS-6X, ideal for FPV drone flight. The design of the radio transmitter is unique in that it is not typical, but more like a gaming console.
This makes it a great choice for pinchers. Because it is lightweight, its form factor is appealing. It’s ergonomically designed with side rubber pads and gimbals for comfort.
The Evolution radio transmitter has eight channels and telemetry capabilities that are suitable for flying micro drones and small quadcopters. The transmitter is well-built and features adjustable length gimbals that have ball bearing support.
It also has illumination. The large monochrome LCD touch screen is easy to use and has simple menu navigation. It can also be backlit for daytime and nighttime. The protective case protects the face and gimbals of the device while it is being carried.
FlySky’s proprietary firmware, the AFHDS 2A, is used to transmit radio signals. It can communicate with iA6, iA6C, and i10B receivers. This makes it incompatible with other brands and limits your options for FlySky or Turnigy receivers.
This transmitter includes a TGY–iA6C receiver that supports both SBUS/IBUS protocols and CPPM/PWM protocols. It also has dual high-gain antennas to provide a safer communication link.
- Portable and lightweight
- Ergonomic gaming controller design,
- Eight channels are available for quadcopter flying
- There are limited options for receivers
How a drone transmitter works
The drone transmitter is an essential part of any drone system. It’s the main way you can control your drone. It is actually what we refer to as the remote controller or RC unit.
Here’s how it works in a nutshell.
A drone must be capable of receiving commands from a control device in order to fly wirelessly. This is the task of the transmitter (TX), and receiver (RX).
The drone houses the RX unit, while the TX unit is kept in the remote controller.
The controller, at its basic level, is capable of sending radio waves. The controller converts electrical signals into electrical signals when you press the button or joystick. This is then converted into radio signals and sent out by the TX.
The radio signal is then received by an RX unit, which converts it into electrical commands. The drone’s flight controller interprets this signal and then executes the given command (increase rotor speeds to increase altitude).
Telemetry data can be sent back from some RX units to the TX unit by certain RX units. This includes information like battery life, voltage, or other pertinent drone flight data. This information is typically displayed on your transmitter screen, if it has one, or in your FPV’s HUD.
A TX unit usually has an RX unit that is bound to it so that it can only respond to that unit. This protects against interference from other transmitters of the same brand.
Your smartphone is the simplest drone transmitter. The simplest drone transmitter is your smartphone. Most drones are controlled via an app that communicates via WiFi (which is also a type of radio signal).
Many Ready-to-Fly drones come with a transmitter included. If you are a hobbyist who builds a drone, you will definitely want one.
The longest investment you will make in your drone hobby is the transmitter. You can expect them to last for the rest of your hobby/career so it is important that you choose the right one.
1. Do I have to register my drone with the FAA?
Possibly. Since regulations and rules are constantly changing, check the FAA site at https://www.faa.gov/uas/.
2. Can I fly my drone if I live near an airport?
There are rules if you would like to fly a drone or quadcopter within 5 miles of an airport. Please assess the FAA website https://www.faa.gov/uas/.
3. Can a drone fly in all weather conditions?
Mild, dry, shallow wind conditions are perfect when flying your drone. Snow or snow conditions could be toxic for the electric parts, which will need to keep dry to work.
Since your radio transmitter is just another component, you can not crash (if you don’t drop it), I’d suggest spending a fair quantity of money on a single.
Features like telemetry could make the difference between losing a jet or draining the battery too much that may save you a small fortune. Usually, pilots utilize a remote for many years, where a new quad might be destroyed after a couple of months.
If funding is, in fact, a variable, you then do have some sound choices, and they will on no account prevent you from using a terrific Best RC Transmitter for FPV drones experience! Should you decide to update in the future, keep in mind, you will need to alter every one of your recipients that could cost you a small fortune. You can visit Staaker to read more information.
Last update on 2022-10-05 / Affiliate links / Images from Amazon Product Advertising API