Want to do mission planning or setup with Tower on Android or MAVPilot on iOS without the hassle of janky cables? What you need is a direct Wifi connection to your drone. The new Pixhawk/APM-compatible Wifi radio from HobbyKing is perfect for this, and just $19.97.  I almost exclusively use mobile apps and wifi now -- 400m range is fine for setup, planning and telemetry. Leave that laptop and those cables at home!

Tired of having to program your APM / Pixhawk system by wire? The APM / Pixhawk Wireless Wifi Radio Module is the perfect solution! This simple yet effective module replaces the 3DR data transmission module and frees you from the limitation of a USB cable. The system is suitable for all flight controllers with TTL interface.

The Wifi Radio module is supplied with both Pixhawk and APM compatible wire harnesses for quick and easy setup. 

• Wireless functionality for Pixhawk and APM
• Compact and lightweight system supplied with Pixhawk and APM wire harnesses
• Replaces the 3DR data transmission system module
• Supplied with Pixhawk and APM wire harnesses

Transmission Rate: 11n:MAX150Mbps;11g:MAX54Mbps;11b;MAX11Mbps
Channels: 1~14
Frequency Range: 2.4 ~ 2.4835 Ghz
Transmitting Power: 14 ~ 18 DBM
Interface: Serial port, GPIO
Transmitting Range: 300 ~ 800 meter
Working Temperature: -20 ~ +70 degrees
Storage Temperature: -40 ~ +80 degrees
Bandwidth: 20MHz/40MHz/Auto Optional

Views: 17610

Comment by Artem on November 4, 2015 at 4:30pm

Greg, it could work, but a separate solution would still be better. telemetry/RC link modem based on this module  would be dirt cheap and most of the software already exists. there are 2 serial ports, plenty of GPIOs, i2c, 160mhz 32bit mpu + 512k flash storage. Reliable communication within 1km without external amplifier. coupled with a 1-2watt amps we are talking about 10-15miles of 115k baud telemetry + WEP encryption + MAC filtering. 

2x serial ports means hardware level serial + sbus. 

Comment by Jiro Hattori on November 4, 2015 at 4:52pm

My curiosity is what kind of software HK utilize on this wifi module.   I don't think HK develop their own software for this product.

Comment by Artem on November 4, 2015 at 5:07pm

Been on the market for several months now:  http://www.ebay.com/itm/Wireless-Wifi-Telemetry-Module-with-Antenna...

great seller communication and works. but as I mentioned earlier and just confirmed my galaxy s6 running Android 5.1.1 doesn't want to connect to internet via cellular while connected to this module. 

Comment by Bill Bonney on November 4, 2015 at 5:22pm

@Artem It depends on how you connect to the module. When I use my ArDrone and connect to it's WiFi network I can download map tiles etc over the cellular network. If, in the case of MAV Pilot, I connect to the WiFi network and make a TCP connection to the modules serial port, I cannot download map tiles over cellular. The upshot is that if you connect to drone (Solo, ArDrone etc using UDP connection) 3G/LTE connections are still possible. Otherwise the phone assumes it a Access Point and the connection is cheaper for data and uses that only. (It maybe with WiFi assist modes that data automatically switches to  3G/LTE but I ahven't done any tests with that yet)

Comment by Rana on November 4, 2015 at 7:11pm

Nice, but there is another much better option;

ESP-07 ESP8266 Serial Wi-Fi Wireless Transceiver Module with Antenn...

+25dBm output power, 3.3v to 5V logic converter inbuilt, easy connectivity.

ESP-07 ESP8266 Serial Wi-Fi Wireless Transceiver Module with Antenna Compatible 3.3V/5V for Arduino

Comment by Rana on November 4, 2015 at 7:12pm

Its price is just 7.88US$ with free shipping !

Comment by Artem on November 4, 2015 at 7:21pm

@ Rana, oh yes, there is a ton of serial-to-wifi modules based on esp8266. The chip is really capable, couple of posts up I suggested building a full scale telemtry/RC modem link based on this module. 

Comment by JB on November 4, 2015 at 8:50pm


Where in the specs does it say "+25dBm output power" on the link you provided. I couldn't find it. That's fairly decent wifi at +300mW.

It should be possible to set the wifi channels to avoid RC.

Comment by Patrick Poirier on November 4, 2015 at 8:50pm
Hello Rana,
I got a couple of these and they are real fun to play with, providing that you can setup a development environment and getting used to the akward AT commands , that brings you back to the modem era...
...and you got to have some kind of programming device or a ftdi adaptor, adding up another couple of $$ and adaptor cable for the autopilot and this funny micro xfl connector for the antenna and then tune up antenna cable for optimal gain on the 2,4 ghz frequency....

Well, my guess is that most of the hobbyist will just buy the unit and go flying :-)
Comment by Jack Crossfire on November 4, 2015 at 9:41pm

Never did get why the multi billion dollar quad copter startups never made a wifi-900Mhz bridge that stood near the phone, converting short range wifi into long range 900Mhz, without janky cables.  It was how hobbyists always did it.


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