Migrate from Wire library about brzo_i2c HOT 4 CLOSED

Well, we have three different levels: The Adafruit Library and the underlaying wire Library and last but not least the i2c communication of the sensor. So, debugging means understanding all three of those levels. I had very quick look at the Adafruit Library and the spec of the bosch sensor and then your modified parts. It's hard to tell what is going wrong, especially since I don't have the sensor, so I cannot check i2c timings with the scope.
I will have a further look at it, probably next week.
ps: When "migrating" from wire Library to brzo_i2c, I would start with having a look at the i2c communication of the sensor and not the actual calls to the wire Library. So, some of the sensors need clock stretching, burst read or .... So, it is this combination of i2c read/writes and the timing which is the crucial thing.

from brzo_i2c.

Hmmm, without the i2c device it is hard to tell where the problem is...

The only thing I could think of: According to the datasheet, section 6.2.1 the i2c master should send: START, Slave address, register address, register data, STOP. Now, in your code you are writing register and register data seperately, i.e. with two brzo_i2c_write calls. The first call brzo_i2c_write(i2c_buffer, 1, false); will send a STOP at the end. So, the i2c device "sees" this as the end of a write transaction, cf. figure 9 in the datasheet. So, I would combine the writes and thus avoiding the STOP between register address and register data.

I would do brzo_i2c_write(i2c_buffer, 2, false)

from brzo_i2c.

Thank you for your answer, brzo_i2c_write(i2c_buffer, 2, false) did the trick.
I assumed the STOP is sent when transmission is closed :(

from brzo_i2c.

@jlohmoeller : I've added a wiki section on "How to migrate from Wire Library", see here

from brzo_i2c.