27 lines
1.1 KiB
Markdown
27 lines
1.1 KiB
Markdown
# AVR firmware for BMP280 wireless sensor (nRF24L01+)
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## Features
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1. Wireless sensor firmware for ATMega168/328 microcontrollers with BMP280 temperature and pressure sensor.
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2. Power consumption in sleep mode approximately 5 uA using Power-down mode.
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3. Transmits device identifier, battery voltage, temperature, and pressure readings on each measurement cycle.
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4. Battery measurement through internal ADC with 1.1 V bandgap reference.
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5. Wake-up from Power-down mode by watchdog timer interrupt with ~8 second interval.
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6. Supports ATMega168, ATMega168P, ATMega168PB, ATMega328, ATMega328P, and ATMega328PB.
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7. Hardware TWI (I2C) for BMP280 communication on PORTC pins PC4 (SDA) and PC5 (SCL).
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## Attention
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1. A compatible RF Gateway is required to receive and process transmitted packets.
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2. Changing gateway address or channel requires reflashing the microcontroller.
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3. The watchdog timer interval is fixed at ~8 seconds; the sensor transmits every 38 ticks (~5 minutes).
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## Using
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In an existing PlatformIO project, run the following command to install the firmware:
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```bash
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cd your_project
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git clone https://github.com/aZholtikov/zh_avr_bmp280_sensor
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```
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