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DS18B20 temperature sensor #1690

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DS18B20 temperature sensor #1690

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98f0984
DS18B20 temperatur sensor
thebino Feb 13, 2026
77dceba
support multiple devices
thebino Feb 13, 2026
63b8b66
check for devices before define initialize true
thebino Feb 14, 2026
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3 changes: 3 additions & 0 deletions platformio.ini
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Original file line number Diff line number Diff line change
Expand Up @@ -119,6 +119,7 @@ lib_deps = ${arduino_base.lib_deps}
[sensor_base]
build_flags =
-D ENV_INCLUDE_GPS=1
-D ENV_INCLUDE_DS18B20=1
-D ENV_INCLUDE_AHTX0=1
-D ENV_INCLUDE_BME280=1
-D ENV_INCLUDE_BMP280=1
Expand Down Expand Up @@ -149,3 +150,5 @@ lib_deps =
stevemarple/MicroNMEA @ ^2.0.6
adafruit/Adafruit BME680 Library @ ^2.0.4
adafruit/Adafruit BMP085 Library @ ^1.2.4
paulstoffregen/OneWire @ ^2.3.8
milesburton/DallasTemperature @ ^4.0.6
31 changes: 31 additions & 0 deletions src/helpers/sensors/EnvironmentSensorManager.cpp
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Expand Up @@ -27,6 +27,16 @@ static Adafruit_BMP085 BMP085;
static Adafruit_AHTX0 AHTX0;
#endif

#if ENV_INCLUDE_DS18B20
#include <OneWire.h>
#include <DallasTemperature.h>
#ifndef TELEM_DS18B20_PIN
#define TELEM_DS18B20_PIN 7
#endif
OneWire oneWire(TELEM_DS18B20_PIN);
static DallasTemperature sensors(&oneWire);
#endif

#if ENV_INCLUDE_BME280
#ifndef TELEM_BME280_ADDRESS
#define TELEM_BME280_ADDRESS 0x76 // BME280 environmental sensor I2C address
Expand Down Expand Up @@ -179,6 +189,17 @@ bool EnvironmentSensorManager::begin() {
}
#endif

#if ENV_INCLUDE_DS18B20
sensors.begin();
uint8_t resetResult = oneWire.reset();
if (resetResult == 1) {
DS18B20_initialized = true;
} else {
DS18B20_initialized = false;
MESH_DEBUG_PRINTLN("OneWire bus is unresponsive!");
}
#endif

#if ENV_INCLUDE_BME680
if (BME680.begin(TELEM_BME680_ADDRESS, TELEM_WIRE)) {
MESH_DEBUG_PRINTLN("Found BME680 at address: %02X", TELEM_BME680_ADDRESS);
Expand Down Expand Up @@ -352,6 +373,16 @@ bool EnvironmentSensorManager::querySensors(uint8_t requester_permissions, Cayen
}
#endif

#if ENV_INCLUDE_DS18B20
if (DS18B20_initialized) {
sensors.requestTemperatures();
for (uint8_t i = 0; i < sensors.getDeviceCount(); i++) {
telemetry.addTemperature(next_available_channel, sensors.getTempCByIndex(i));
next_available_channel++;
}
}
#endif

#if ENV_INCLUDE_BME680
if (BME680_initialized) {
if (BME680.performReading()) {
Expand Down
1 change: 1 addition & 0 deletions src/helpers/sensors/EnvironmentSensorManager.h
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Expand Up @@ -22,6 +22,7 @@ class EnvironmentSensorManager : public SensorManager {
bool SHT4X_initialized = false;
bool BME680_initialized = false;
bool BMP085_initialized = false;
bool DS18B20_initialized = false;

bool gps_detected = false;
bool gps_active = false;
Expand Down
2 changes: 2 additions & 0 deletions variants/xiao_s3_wio/platformio.ini
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Expand Up @@ -228,6 +228,8 @@ build_flags =
-D ADVERT_LAT=0.0
-D ADVERT_LON=0.0
-D ADMIN_PASSWORD='"password"'
-D ENV_INCLUDE_DS18B20=1
-D TELEM_DS18B20_PIN=3
; -D MESH_PACKET_LOGGING=1
; -D MESH_DEBUG=1
lib_deps =
Expand Down