Switch between RTL Rx and RcSwitch TX -- Rx stops working

[cgmckeever]

I'm trying to

• use Rx from the RTL_433_ESP library to listen for sensors
• disable it with a Tx request
• switch to Tx with the RC Switch library; send a pulse and switch back to listening

The good news (that may be surprising) is that it works ... prototype is here

The bad news is, after a few toggles Rx just stops. I can't figure out if it similar to the deaf-state or even the freq change Rx stop OR if Im just doing something either impossible or missing something silly.

The swap works, sometimes. I usually get 1 swap before I can't get any more Rx. But there are some times I can get a few. But it always goes deaf. Any ideas .. appreciate it

The main bits for enabling/disabling are

// RTL
//
void rtlSetup() {
    Log.notice(F(" " CR));
    Log.notice(F("****** RTL setup begin ******" CR));
    Log.notice(F("Frequency: %F" CR), config.frequency);
    rf.initReceiver(config.receivePin, config.frequency);
    enableRx();
    rf.setCallback(rtl433Callback, messageBuffer, messageBufferLen);
    Log.notice(F("****** RTL setup complete ******" CR));
}

void enableRx() {
    ELECHOUSE_cc1101.SpiStrobe(CC1101_SIDLE);
    ELECHOUSE_cc1101.SetRx(config.frequency);
    //ELECHOUSE_cc1101.setMHZ(config.frequency);
    rf.enableReceiver(config.receivePin);
}

void switchTransmit(float freq, int pulse, int decimal, int bits) {
    Log.notice(F("Sending:" CR));
    Log.notice(F("  freq: %F" CR), freq);
    Log.notice(F("  pulse: %d" CR), pulse);
    Log.notice(F("  decimal: %d" CR), decimal);
    Log.notice(F("  bits %d" CR), bits);

    rf.disableReceiver();
    ELECHOUSE_cc1101.SpiStrobe(CC1101_SIDLE);
    //ELECHOUSE_cc1101.setMHZ(freq);
    ELECHOUSE_cc1101.SetTx(freq);

    mySwitch.enableTransmit(config.transmitPin);
    mySwitch.setPulseLength(pulse);
    mySwitch.send(decimal, bits);
    mySwitch.disableTransmit();

    enableRx();
}

void rtl433Callback(char* message) {
    Log.notice(F("Received message: %s" CR), message);
    messagePost("sensor", message);
}

void messagePost(String path, char* message) {
    HTTPClient http;
    WiFiClient client;

    String url = String(config.serverURL);
    url.trim();

    http.begin(client, url + path);
    http.addHeader("Content-Type", "application/json");
    int httpResponseCode = http.POST(message);
}

void setup() {
    Serial.begin(115200);
    Log.begin(logLevel, &Serial);

    ELECHOUSE_cc1101.Init();
    configSetup();
    rtlSetup();
}

void loop() {
    configManager.loop();
    rf.loop();
}

[NorthernMan54]

If you look at the OpenMQTTGateway implementation I have implemented that particular use case, as I use it all the time.

Listen with RTL_433 and Transmit with RC_SWITCH

[cgmckeever]

Thanks! Least Im not crazy .. Confirming this project https://github.com/1technophile/OpenMQTTGateway/blob/development/main/main.ino .. any hint to which hood to lift up? Appreciate it

[NorthernMan54]

Unfortunately multiple. I had to update the driver for each protocol decoder to support switching etc

This was the PR with the enhancement

[NorthernMan54]

Ooops

https://github.com/1technophile/OpenMQTTGateway/pull/936

[cgmckeever]

real good .. Thanks @NorthernMan54 ... looks very similiar to the way I approached it ... Ill dig in!

[cgmckeever]

Similar patterns .. no 💡 I did notice rf.initReceiver(-1); .. which I cant do. Probably an earlier library version.

two new discoveries. If I just rf.disableReceiver(); and dont even do Tx, I cant cant seem to get back to Rx

ie

• Receiving
• rf.disableReceiver();
• Try to re-enable

  
  ELECHOUSE_cc1101.SetRx(config.frequency);
  ELECHOUSE_cc1101.setMHZ(config.frequency);

rf.setCallback(rtl433Callback, messageBuffer, messageBufferLen); rf.enableReceiver(config.receivePin);

I more often than not, get no Rx. With that, attempting to `rf.initReceiver(config.receivePin, config.frequency);`  throws

WARNING: low memory? malloc() failed in blueline_create() from /Users/cgmckeever/Documents/Arduino/libraries/rtl_433_esp/blueline.c:416 21:05:05.746 -> Guru Meditation Error: Core 1 panic'ed (LoadProhibited). Exception was unhandled.

[cgmckeever]

It seems (or at least works) magic combo was

void disableRX() {
    rf.enableReceiver(-1);
    rf.disableReceiver();
}

Thanks for leading me to that other code!!