BMP280 and Ibus

[erwann56]

I quickly tested the "BMP280 module 3.3V (6 pins, I2C/SPI)" with GPS and voltage. I have 3 additional sensors which appear TEMP1, 00Gp and Vspd). Temp1 displays 40° and the others are at 0. GPS and voltage are OK. I connected the BMP280 to the arduino nano at 3.3v, GND, A4 and A5. Did I forget something?

[dgatf]

Fixed now. Flash updated code

[erwann56]

I always have the BMP values ​​at 0 except TEMP1 at -40. I did a scan of the i2c port, I can't find my sensor. I do not understand why. I'll keep you informed.

[erwann56]

The i2c scan finds it with the address 076. (dry solder on A4) The telemetry is always identical temp1 -40 and alt at 0.

For the BMP280, what address should you put 76 or leave 119 (default on Gui)?

[dgatf]

• Check connections
• Check SDA/SCL are not swapped
• You are using arduino at 5V, so you should use the 5V version (4 pins) of the BMP280. See remark. If it is the 3.3v version (6 pins), you may have burnt it (it may not get burn if sensor Vcc is connected to 3.3v, but still could be due to I2C at 5v)
• If I2C scan doesn't find it, most likely is burnt

[erwann56]

I will test again but everything seems OK at the sensor level. For the I2C address, should I leave 119 or put 76?

[dgatf]

If using lua script, use a decimal number 118 If using config.h, use either a hex 0x76 or decimal 118

For the I2C address, should I leave 119 or put 76?

Note that 119 is 0x77, not 0x76

Usually BMP280 is either 0x76 (118) or 0x77 (119). Try both

[erwann56]

It was an address problem. I had to put 118. However, there is a lag for temperature. Instead of 21°c I have -18°c.

[dgatf]

Temperature and sat formats fixed.

Also added vario for gps.

[erwann56]

Everything is perfect.