RAK7205

The RAK 7205 is a board containing the RAK811 module, which in turn contains the ST STM32L151CBU6A micro processor, the Semtech SX1276 LoRa chip as well as a 3200mAh battery and a solar cell for charging it. It has the following peipherials:

• ST LIS3DH accelerometer
• Bosch BME860 air quality sensor
• Ublox MAX-7Q GPS

Requirements

• Add the current user to the dialout group: sudo usermod -a -G dialout $USER
• Restart the session
• Install cutecom: sudo apt-get install cutecom

Connection

• Connect the board to the PC using a micro USB cable.
• Retrieve the serial port name: dmesg | grep tty. Remember the device on the line containing cp210x.
• Open CuteCom and open the above serial port.
• Set the line separator to CR/LF and the input type to Script.
• To test the connection, input the following command: at+version. This should return something similar to Firmware Version: RUI v3.0.0.12.H.T1. If the modem was sleeping, it will print Wake up. Send the command again to actually execute it.

Registration at the LPNP

To get the required information for registering a device at the LPNP, run the command at+get_config=lora:status. It will output the following data:

• DevEUI
• AppEUI (also known as JoinEUI)
• AppKey

Transmission of sample data

To transmit sample data, send at+send=lora:1:123456.

Send interval

Use at+set_config=lora:send_interval:1:120 to set the send interval to 120 seconds.

Firmware upgrade

To upgrade the firmware, upload your source code as a zip file to the RUI Online Compiler. Select RAK811-H as the product and run the compiler.

To put the device into DFU mode, run the command at+set_config=device:boot. It should print <BOOT MODE>. Disconnect the serial console and run the RAK Device Firmware Upgrade Tool to flash the new firmware to the device. Reconnect the serial console after you are done. You may need to run at+run to start the device.