Example 40: BMP280 Pressure Sensor

Experiment Overview

BMP280 is a digital pressure/temperature sensor using I2C. FastBee includes the driver in the release baseline.

Note: This feature requires FASTBEE_ENABLE_I2C_SENSORS=1 and active i2cSensors.

Hardware Wiring

Board Label	GPIO Pin	Connected Device
SDA	GPIO21	BMP280 SDA
SCL	GPIO22	BMP280 SCL

BMP280 I2C address: SDO to GND = 0x76, SDO to VCC = 0x77.

JSON Configuration Example

{
  "peripherals": [
    {
      "id": "bmp280_01",
      "name": "BMP280 Barometer",
      "type": 38,
      "enabled": false,
      "pins": [21, 22],
      "params": {
        "category": "bmp280",
        "i2cAddress": "0x76"
      }
    }
  ]
}

Data Channels

Channel	Field Name	Unit	Description
0	temperature	°C	Ambient temperature
1	pressure	hPa	Atmospheric pressure
2	altitude	m	Estimated altitude (based on standard pressure)

Peripheral Execution Linkage

Scenario: Pressure & Temperature Monitoring (Timer Trigger)

Feature: Periodically read BMP280 pressure and temperature data

Web UI Configuration Steps

Step 1: Create Rule

1. Click Peripheral Execution in the left menu
2. Click New Rule button
3. Fill in basic configuration:
   • Rule Name: Pressure & Temperature Monitoring
   • Report Data: ✅ Enabled
   • Enable: ✅ Enabled

Step 2: Configure Trigger (Timer Trigger)

1. Click Add Trigger button

2. Fill in trigger configuration:

   Field	Value	Description
   Trigger Type	Select Timer Trigger	Periodic collection
   Timer Mode	Select Fixed Interval	Second interval
   Interval	10	10 seconds

Step 3: Configure Action (Sensor Read)

1. Click Add Action button

2. Fill in:

   • Action Type: Select Sensor Read
   • Target Peripheral: Select bmp280_01
   • Data Field: pressure (pressure)

3. Click Save button

BMP280 Data Channels

Channel	Field Name	Unit	Description
0	temperature	°C	Ambient temperature
1	pressure	hPa	Atmospheric pressure (300-1100hPa)
2	altitude	m	Estimated altitude (based on standard pressure)

Notes

1. Firmware State: Confirm i2cSensors is compiled and active
2. I2C Sharing: Can share bus with other I2C devices (SDA/SCL)
3. Altitude Accuracy: Altitude estimation is based on standard pressure 1013.25hPa; actual calibration needed
4. Sampling Interval: 5-10 seconds sampling recommended
5. BME280 Compatible: BME280 (with humidity) uses the same address and basic protocol