HTU21D example does not work in release mode

[forGGe]

See analyser output:

[rasendubi]

I'll decipher what happens:

• The first two types issue a soft reset command, so device goes down.
• The third and last byte is a start of a temperature read command.

It fails because the device did not answer with an ACK (due to it being resetting). Now the I2C driver is waiting for a Master Transmitter Mode Selected event, which never occurs due to the error.

This issue directly relates to #19. I would say, this issue is an instance of absent error handling.

A fast workaround is to add a ~15ms delay to allow HTU21D complete reset before issuing the read command.

[forGGe]

A fast workaround is to add a ~15ms delay to allow HTU21D complete reset before issuing the read command.

@Dubland, since you are working on #183 , it will be useful to you also check @rasendubi's workaround.

[rasendubi]

ping @Dubland ?

[Dubland]

With delay after soft reset example working fine. Shall I create PR for adding the delay?

Also, need to swap RX and TX for UART-to-USB converter in the documentation.

[rasendubi]

Shall I create PR for adding the delay?

Yes please.

[forGGe]

@Dubland now, when #271 is merged, I propose to try find real root cause and fix it. @rasendubi can guide you trough it.

[forGGe]

@Dubland any news?

[forGGe]

Implement in #279 Thanks to @Dubland !