15-10-2018, 03:48
Hi Colin
Thank you for describing this particular situation. I understand that it can be seen as software problem, but it isn't. Once the selected T/H sensor is anything else than the BME280, you only get barometric readings if you install an BMP280 (or BMP180) and select it.
The baro, temperature and humidity readings from the BME280 are done at once, in a single statement, so when we are using a different T/H sensor, the baro isn't read.
Of course the code could be write in another way, but since the major benefit of the BME280 is having all the three readings from just one sensor, I didn't separate the read routines.
In any case, to avoid the influence of the internal heat produced by the electronics, the module which contains the indoor T/H sensor (being a BME280 or an SHTxx) should always be placed outside the box where the system is installed. Exactly was you have found!
Out of curiosity, give a look at the detail of an external housing for the T/H sensor (small box on the back) included on the excellent box designed by Jarekh3 for the WeatherDuino Pro2 Plus receiver.
![[Image: ?url=cdn.thingiverse.com%2Frenders%2Ffb%...atured.jpg]](https://images.weserv.nl/?url=cdn.thingiverse.com%2Frenders%2Ffb%2Fd4%2F0f%2Fb0%2F6c%2F65a0d38be681f2aee132587c0624162b_preview_featured.jpg)
Thank you for describing this particular situation. I understand that it can be seen as software problem, but it isn't. Once the selected T/H sensor is anything else than the BME280, you only get barometric readings if you install an BMP280 (or BMP180) and select it.
The baro, temperature and humidity readings from the BME280 are done at once, in a single statement, so when we are using a different T/H sensor, the baro isn't read.
Of course the code could be write in another way, but since the major benefit of the BME280 is having all the three readings from just one sensor, I didn't separate the read routines.
In any case, to avoid the influence of the internal heat produced by the electronics, the module which contains the indoor T/H sensor (being a BME280 or an SHTxx) should always be placed outside the box where the system is installed. Exactly was you have found!
Out of curiosity, give a look at the detail of an external housing for the T/H sensor (small box on the back) included on the excellent box designed by Jarekh3 for the WeatherDuino Pro2 Plus receiver.