Sleeping with RFM95 ?

[Aymeric]

Hi,
I'm trying to put a node to sleep that consists of an Arduino Pro Mini board (3.3 V, 8 MHz) and an RFM95 module (SX1276 chip) using MySensors (2.4.0). In the code below, the node does not go to sleep. I've tried with and without transportDisable/transportReinitialise, and also cutting power to the RFM95 module using powerDownRadio / powerUpRadio, but whenever sleep actually works, the radio transmission no longer works after waking up… I don’t know what else to test. Any idea? Is it a hardware problem ?

#define MY_DEBUG
#define MY_RADIO_RFM95
#define MY_RFM95_FREQUENCY (RFM95_868MHZ)
#define MY_IRQ_PIN 2
#define MY_RST_PIN 9
#define MY_NODE_ID 22

#include <MySensors.h>

MyMessage msgTestRfm(100, V_CUSTOM);

void presentation() {
sendSketchInfo("Test RFM", "1.1");
present(100, S_CUSTOM);
}

void loop() {

send(msgTestRfm.set(1));
wait(200);

// couper la radio (sinon sleep() bloque)
transportDisable();
wait(50);

// sommeil — pas de LowPower ici !
sleep(5000);

// réactiver la radio
transportReInitialise();
wait(200);

Serial.println("Réveillé !");
}

[TheoL]

I don't think you should have to disable the transport. Just look at the example of the Sensebener https://www.mysensors.org/hardware/micro

A simple sleep should be sufficient .... I didn't even know the transportDisable and transportReinitialise were part of the library :)

And not really sure with what you mean with sleep not working. If you remove the transportDisable, the waits and the transportReinitialise you should see a reading every 5 seconds in your controller.

[tekka]

@Aymeric As @TheoL mentioned, the library automatically handles putting the radio to sleep when you call sleep(). The functions transportDisable() and transportReinitialize() are internal to the library and not meant to be used directly.

If you can share the serial/console output, we may be able to better understand what’s going on.

[Aymeric]

Thanks for your answers. I tried the code keeping only sleep without the other functions, and it worked once. When I uploaded another, more complex sketch, it didn’t work anymore, and even if I put back the one that used to work, it no longer works :
4098 TSF:MSG:SEND,22-22-0-0,s=100,c=1,t=48,pt=2,l=2,sg=0,ft=0,st=OK:1
4306 MCO:SLP:MS=5000,SMS=0,I1=255,M1=255,I2=255,M2=255
4311 TSF:TDI:TSL
4315 MCO:SLP:WUP=-1
4317 TSF:TRI:TSB
Réveillé !
4419 TSF:MSG:SEND,22-22-0-0,s=100,c=1,t=48,pt=2,l=2,sg=0,ft=0,st=OK:1
4628 MCO:SLP:MS=5000,SMS=0,I1=255,M1=255,I2=255,M2=255
4632 TSF:TDI:TSL
4636 MCO:SLP:WUP=-1
4638 TSF:TRI:TSB
Réveillé !

I think there is a problem with PIN 2 / IRQ because if I connect the IRQ to GND, there is a 5 s sleep, but then the radio no longer works.

13764 MCO:SLP:MS=5000,SMS=0,I1=255,M1=255,I2=255,M2=255
13770 TSF:TDI:TSL
13772 MCO:SLP:WUP=-1
13774 TSF:TRI:TSB
Réveillé !
20779 !TSF:MSG:SEND,22-22-0-0,s=100,c=1,t=48,pt=2,l=2,sg=0,ft=1,st=NACK:1

[mfalkvidd]

@Aymeric are you sure the node isn’t sleeping for 5 seconds? WUP=-1 means it woke up by timer.

Check using an external clock, and/or turn on timestamps on the Arduino IDE log.

[Aymeric]

Hello, it was a hardware problem. I had tried with two different Pro Mini boards, but after trying with a third one, everything is working now. Thank you for your help.

[mfalkvidd]

Nice work @Aymeric, thanks for reporting back!

[TheoL]

I learned my lessons about bread boards. Slowly replacing my cheap AliExpress ones with good quality ones. I blew up 2 nano's and 1 nrf this week because of a bad breadboard