Bosch BMP280
Also known as: BMP280 · GY-BMP280 · Temperature & humidity
The honest budget barometer: when you want pressure and temperature for a dollar and don't need humidity, this is exactly the right part.
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At a glance
⚑ flag an error| Measures | temperature, pressure |
|---|---|
| Accuracy | ±0.5 °C / ±1 hPa; no humidity |
| Interface | I2C @ 0x76 / 0x77 |
| Supply | 3.3 V |
| Battery-viable | Yes (deep-sleep friendly) |
| ESPHome | Native ESPHome component — bmp280_i2c |
| Typical price | $1-2 (street, varies) |
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Which one do I buy?
It's the chip your fake 'BME280' probably was. Sold honestly, it's fine.
Clone check
Low clone risk. Ironically safe — nobody fakes the cheap one. Just don't pay BME prices for it.
Good for
Gotchas to know
- Same self-heating advice as the BME280: forced mode or longer intervals for accurate temperature.
Wiring it up
It's I2C, so it shares two pins with every other I2C sensor you own — chain your climate/light/CO2 stack on one bus and mind the address clashes (this one lives at 0x76 / 0x77). Any ESP32 dev board works.