Help with OneWire DS18B20 and LoRaWan_APP

[kj1653]

Hello.
Have tried with Heltec Lora V3 and V4 and have not been able to make it work. Need a node to read 3 DS18B20 temperatures and corresponding battery voltage which then needs to be transmitted to another Lora Heltec Gateway which in turn send data over internet with a Graph.
The second part (Gateway) works great and I can make everything work fine with a DHT20, however, it must work with a ds18b20 thermometers.
Seems like a complete incompatibility between LoraWAN_APP (Heltec), HT_SSD1306Wire and OneWire/DallasTemperature.
It just does not compile, have also made the modifications to the onewire incompatibility with pins issue and still does not compile or crashes.
Can you PLEASE HELP

[UniquePete]

It’s a little difficult to offer any specific comment without seeing your code, but I do use the LoRaWan_APP library with the DS18B20 on the V3 module. However, I have always used the ThingPulse SSD1306 library.

For the V4 module, I gave up on the LoRaWan_APP library and went with the RadioLib library, although there is a little ‘extra work’ to get things going in this case, again with the DS18B20 and ThingPulse SSD1306 library.

While things have not always been straightforward, I’ve never had a problem with compilation, only with execution. But, as I say, I have both working in applications. Unfortunately, the code includes a lot of other stuff, so it’s not really practical to include that here, but it is available if you’re stuck.

[UniquePete]

I think I see the source of the compilation problem… I’m away from my normal development environment at the moment but using the WiFi LoRa 32 V4 environment that I have at hand, which uses all the latest versions of the Heltec software, I do get the compilation error described in the following post:

Heltec v3 and Onewire problem

Help please I need to program the heltec wireless stick v3. I can program it with examples->heltec esp32 dev-boards->LoRaWAN->LoRaWan. But i need to add ds14b20 sensor’s data. So i need to use onewire library. I can use examples->onewire->ds18x20_Temperature. But when try to compile sketch that includes both “LoRaWan_APP.h” and <OneWire.h> i have the error described below And there is an interesting moment. I can compile my sketch using onewire.h using 2.3.3 version of library. But i cannot ge…

With a clue from a related post:

OneWire compile errors

#include “driver/gpio.h” In your code, include this header file

I can get the example sketch included in the first post above to compile if I do the following:

1. Create the directory Arduino/hardware/heltec/esp32/cores/esp32/driver
2. Copy the file Arduino/hardware/heltec/esp32/tools/esp32-arduino-libs/esp32s3/include/driver/gpio/include/driver/gpio.h to that directory
3. Edit the file Arduino/hardware/heltec/esp32/cores/esp32/esp32-hal-gpio.h and add the line
   
   #include "driver/gpio.h"
   
   with the other #include statements near the top of the file.

That should at least solve the compilation problem. As noted, I’m not near my normal development environment at the moment so I don’t have access to a V3 hardware configuration that includes the sensor to verify that the sketch actually works. I do, however, have a V4 module configured with a DS18B20 sensor with me and that is working just fine, although the V4 configuration is using the RadioLib library.