- Thu Nov 02, 2017 2:33 pm
#71468
I also see 2 variants. One uses I2c (4 pins) and the other SPI (6 pins). I've never used either but it appears I2c is easier to interface. Is there a reason to use SPI?
Moderator: igrr
- Thu Nov 02, 2017 2:48 pm
#71470
There is no real reason to choose SPI other than transfer speed which is useless for small sensors.
Speed transfer for LCD it is worth.
Speed transfer for LCD it is worth.
- Thu Nov 02, 2017 7:04 pm
#71475
https://www.aliexpress.com/item/3In1-BM ... 09083.html
As stated below. The BME280 is the sensor with humidity and temperature. I bought some SHT30 to try out.
https://www.aliexpress.com/item/SHT30-S ... 46226.html
bkenobi wrote:Do you have a source that you'd recommend? I've been looking on eBay as I typically do but am having trouble sorting through the mislabeled BMP280 sensors and the ones where they are fake items (selling the sensor, but a fake flower for $0.01). I've read they should be around $2 but so far I'm only seeing $5-10. I was going to buy a few so the per unit price makes a bit of a difference.
https://www.aliexpress.com/item/3In1-BM ... 09083.html
As stated below. The BME280 is the sensor with humidity and temperature. I bought some SHT30 to try out.
https://www.aliexpress.com/item/SHT30-S ... 46226.html
Last edited by rudy on Thu Nov 02, 2017 9:51 pm, edited 2 times in total.
- Thu Nov 02, 2017 8:33 pm
#71476
Careful, that sensor for $0.75 is the BME280 (pressure only). Aliexpress does have the 4-pin BME280 for a better price than ebay but for some reason charges shipping on orders over 1 (free for a single though). I ordered 6 6-pin sensors this morning that are supposed to support both I2C and SPI.
