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Revise I2C addresses for supported sensors

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Updated I2C addresses for various sensors in the documentation.
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IoTThinks
2025-12-28 09:18:14 +07:00
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commit 2a5bfc310c
1 changed files with 15 additions and 3 deletions
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firmware/Add-sensors-to-repeaters.md
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@@ -26,17 +26,19 @@ On Heltec v3, the GPIO17 and 18 are tiny pads in the middle of the board bottom.
## 3. I2C Sensors
This is the list of sensors currently supported by official MeshCore firmware.
- You may need to do some solder to make sure the sensors use the pre-defined I2C addresses.
### 3.1 GPS
This is for GPS sensor.
### 3.2 AHTX0
This is AHT10 and AHT20 Humidity and Temperature Sensor.
- I2C address: 0x38
### 3.3 BME680
The BME680 is a compact environmental sensor by Bosch that measures temperature, humidity, barometric pressure, and air quality (gas/VOC).
* Note: As of 20 Dec 2025, MeshCore app can not show the Gas telemetry properly in Channel 1 or 2.
* MeshCore requires I2C address **0x76** for BME680
* I2C address: **0x76**
* For Adafruit BME280, you need to solder the Addr pad to use I2C address 0x76.
* For other BME280 boards, you are strongly recommended to wire **GND to SDO** to force to use address 0x77. Else, the I2C address may jump either 0x76 and 0x77.
@@ -44,7 +46,7 @@ The BME680 is a compact environmental sensor by Bosch that measures temperature,
### 3.4 BME280
The BME280 is a compact environmental sensor by Bosch that measures temperature, humidity, and barometric pressure.
* MeshCore requires I2C address **0x76** for BME280
* I2C address: **0x76**
* For Adafruit BME280, you need to solder the Addr pad to use I2C address 0x76
* For other BME280 boards, you are strongly recommended to wire **GND to SDO** to force to use address 0x77. Else, the I2C address may jump either 0x76 and 0x77.
@@ -52,37 +54,47 @@ The BME280 is a compact environmental sensor by Bosch that measures temperature,
### 3.5 BMP280
BMP280 is a Bosch barometric pressure + temperature sensor (no humidity).
* I2C address: **0x76**
### 3.6 SHTC3
SHTC3 is a Sensirion temperature + humidity sensor, optimized for ultra-low power designs.
* I2C address: **0x70**
### 3.7 SHT4X
SHT4x (SHT40 / SHT41 / SHT45) is Sensirion’s newer temperature + humidity sensor family, replacing SHTC3/SHT3x for many designs.
* I2C address: **0x44**
### 3.8 LPS22HB
LPS22HB is an STMicroelectronics barometric pressure + temperature sensor, commonly used in low-power IoT designs.
* I2C address: **0x5C**
### 3.9 INA3221
INA3221 is a Texas Instruments 3-channel shunt voltage & bus voltage monitor, often used for power and battery monitoring.
* I2C address: **0x42**
### 3.10 INA219
INA219 is a Texas Instruments single-channel current, voltage, and power monitor—simple, popular, and well-supported.
* I2C address: **0x40**
### 3.11 INA260
INA260 is a Texas Instruments current, voltage, and power monitor with an integrated precision shunt resistor, making it much easier to use than INA219/INA226.
* I2C address: **0x41**
### 3.12 INA226
INA226 is a Texas Instruments high-precision current, voltage, and power monitor, more accurate and flexible than INA219, and widely used in power profiling.
* I2C address: **0x44**
### 3.13 MLX90614
MLX90614 is a Melexis non-contact infrared (IR) temperature sensor, widely used for surface and body temperature measurement.
* I2C address: **0x5A**
### 3.14 VL53L0X
VL53L0X is an STMicroelectronics Time-of-Flight (ToF) laser distance sensor, very popular for short-range, accurate distance measurement.
* I2C address: **0x29**
### 3.15 BMP085
BMP085 is an older Bosch barometric pressure + temperature sensor (the predecessor to BMP180 / BMP280).
* I2C address: **0x77**