User Manual

Parameters:
Weight: 42g (include antenna)
Dimension: 64*49*23mm (exclude antenna)
Shell shape compatible with: Frsky, JR radio etc.
MCU: STM32F103CBT6 (128K ROM, 20K RAM)
Working voltage: 4.5-7.0v
Working current: <=100mA
Working frequency: 2.4G ISM band
RF power: +22dBm
Two working modes: Serial Port mode & PPM mode.
1. Normal operation in Serial Port mode (Bi-directional digital signal
communication between radio and JP4IN1.)
Rotate the encoder knob to"0" to enter the serial port mode, all existing protocols can be used
in this mode, the protocol switching and bind operation can be achieved by the radio menu, but
only radio using er9X/erSky9X or OpenTX open source firmware can use serial port mode, Frsky
all series radio are compatible with this mode. In addition, radio firmware also needs to be
upgraded to the newest version V2.2 and above.
Let’s take Frsky X9D as an example:
Download V2.2 and above version firmware from official website, Copy firmware to a SD card,
insert to Frsky X9D radio SD card slot, push the roll trim button and yaw trim button to the
center, then power on the radio, radio will upgrade the firmware automatically. (If you have
already finished upgrade, Please ignore this operation.)