Using MDOT with sensors and actuators

[Antonio Yubaile]

I am new using LoRaWAN technologies. I have send text uplinks and downlinks using AT Commands. But now I don’t know how to use a sensor and actuator with the mDot

I am searching about low power consumption too. How can I sleep the mdot and wake up when I need to receive or transmitt?

[Jason Reiss]

To interact with sensors you will need to do some custom development with mbed.

https://os.mbed.com/platforms/MTS-mDot-F411/

[Antonio Yubaile]

I have used the MBED Dot-examples and I can send uplinks and downlinks, but I want to turn on a LED when I receive a downlink. How is it possible? I have searched in libmdot and I have not found anything

[Jason Reiss]

See the mDot at firmware for an example of setting up custom event handlers.
https://os.mbed.com/teams/MultiTech/code/Dot-AT-Firmware/?platform=MTS-mDot-F411

Using the setEvents function a custom event handler can be provided to the dot library.

CommandTerminal.h and CommandTerminal.cpp define a RadioEvent object inheriting the mDotEvent Class.

Be sure to call the base class functionality to fill the packet _flags and _info objects of the mDotEvent.

CommandTerminal.h

class RadioEvent : public mDotEvent { ...

CommandTerminal.cpp

void CommandTerminal::init() {
    _dot->setEvents(_events);
}

void CommandTerminal::RadioEvent::PacketRx(uint8_t port, uint8_t *payload, uint16_t size, int16_t rssi, int8_t snr, lora::DownlinkControl ctrl, uint8_t slot, uint8_t retries) {
    mDotEvent::PacketRx(port, payload, size, rssi, snr, ctrl, retries);
 
    if (serial_data_mode) {
        logDebug("Rx %d bytes", size);
        if (size > 0) {
            CommandTerminal::Serial()->write((char*) RxPayload, RxPayloadSize);
        }
        if (!CommandTerminal::Serial()->readable() && _dot->getAckRequested() && _dot->getClass() == "C") {
            _sendAck = true;
        }
    }
}

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