SI7021 Multisensor - first try

[dakky]

does the sleeping current come down to an acceptable level when removing the regulator? 1500uA is quite much for a battery powered node.

[n3ro]

@dakky said:

1500uA

The sleeping current is ~240uA.

But it's possible to tune it a little bit more.

[dakky]

hmm ok 240uA is better of course, but still far away from

@m26872 said:

Mine sleeps at 11uA.

[n3ro]

@dakky Yes, this is because of the multiple sensors on my board. maybe somebody have more tuning tipps.

[Maciej Kulawik]

@riataman said:

Then I ordered this breakout for future nodes: http://www.aliexpress.com/item/New-HTU21D-Temperature-and-Humidity-Sensor-Module/1970355069.html?ws_ab_test=searchweb201556_1_79_78_77_80,searchweb201644_5,searchweb201560_1 that one doesn't seem to include any additional circuits (other than the pull up resistor and safety? resistor).

Thanks for tip!
Unfortunatelly quite expensive. I bought my Si7021 modules on ali for 2,9$.

And what chip is used on this HTU21D module? Si2071 too?
If not, what library is to be used to communicate?

[GertSanders]

Adafruit have a library for the htu21d which works well with Mysensors