mDots^™ using version 1.0.8 (or later) AT Firmware or Library can be configured for peer-to-peer communication. Configuring two or more mDots with the same network settings allows communication between them. Enabling ACKs guarantees packet deliver; however, this may disrupt higher level protocols such as zmodem or ymodem file transfers. Communication between mDots is half-duplex so both ends should not transmit at the same time, otherwise communication will be disrupted.

The frequency can be set for US 915 models. We advise using 915.5-919.7 to avoid interference with LoRa Networks.

In Europe, use a fixed frequency, 869.85, with 7 dBm power setting to allow 100% duty-cycle usage.

Configuration

In this example each side will be setup with identical settings and serial data mode will be started. Then text can be entered into a terminal on either side and it will show up received on the other mDot.

AT+NJM=3
AT+NA=00112233
AT+NSK=00112233001122330011223300112233
AT+DSK=33221100332211003322110033221100
AT+TXDR=DR8 (US:DR8-DR13,EU:DR0-DR6)
AT+TXF=915500000 (US-ONLY:915.5-919.7)
AT&W
ATZ
AT+SD

Peer-to-Peer Throughput