HiLetgo 5pcs High Precision BMP280-3.3 Atmospheric Pressure Sensor Replace BMP180/BMP186

Llego rapido y muy bien empacado

These work fine, but I meant to buy the BME280. You don't have to "manually change the address inside the Adafruit_BMP280.h to: #define BMP280_ADDRESS (0x76)". At least, not anymore. Just use the commented line, and comment the one that is un-commented in the example code. Your code should look like this: status = bmp.begin(BMP280_ADDRESS_ALT, BMP280_CHIPID);// status = bmp.begin();BMP280_ADDRESS_ALT is defined as 0x76

Purchased two bags of 5 at different times from HiLetgo through Amazon. In the second set of five only two worked properly. One read 220 hPa off! These HiLetgo breakout boards were junk! I am concerned maybe the rest will fail soon after they are deployed in our product. I will not buy anything made by HiLetgo again despite their cheapest price.

There is no humidity and you need BMP280 library

The device works great. I am impressed with the accuracy and stability. There is a little bit of calibration to do. Just go out and get about 4-5 locations of pressures from various airports in your area. Average those measurements out, then turn around and get a reading from the sensor and then subtract it from the average and take that difference and remove it. It is around 40 or so. Once that calibration is in your code. It stays with no real change necessary. I have run this thing for 3 days straight taking measurements once a minute using an Arduino ESP8622. Works excellent.

I tried a lot to get these to work, at first four of the five were working great, but after a few hours of gathering data one showed a bunch of garbage information then prompted stopped sending any data, two more did the same within the next few hours. One kept chugging along fine, but gets finicky if I do much with it.Now one heats up rapidly when connected until it smokes, two started requiring the CS pin to be put to VCC to get into I2C mode (what the chip is meant to do, but the breakout is meant to remove the need for the extra wire to the CS pin) and will gradually start heating up as data is polled until they stop working (but never smoke), you'll see an immediate bump between the first two readings of 10 degrees then it'll gradually climb from there, and the one odd one out seems to work as long as I use all five wires to 1) Put into I2C mode (CS to VCC) 2) Switch from 0x76 to 0x77 (SDO to VCC).This entirely defeats the purpose of I2C since you end up needing to use all six connections.So I tried SPI mode, this worked a lot more consistently, but obviously requires you to use all of the wires as well, so you don't really gain or lose anything, but using six wires instead of four really sucks and kills the need for the breakout entirely. Unfortunately the sensors with the heating issue continued to be problematic in SPI mode, but the one sensor works great in both modes.I've had a lot of success with HiLetgo products, and was really disappointed here, but I have to give them an extra star for how hard they worked with me trying to help me figure out the issue. I'll probably buy another batch from another seller that has better reviews. This failure indicates something wrong with the SMD resistors used to handle the CS pin's default state.

I only tried one of the 5 that I received but it worked fine, and compared to a different BMP280 from a diff manufacturer, it was accurate.To make it work, you must use Vcc as 3.3V and hook SDO to 3.3V for I2C interface. No level converters are required and the address is 0x77.

VERY small form factor makes installation in tight spaces easy. Altitude wanders a bit, but doesn't run off in just one direction like so many others. Temperature seems to be right on, at least in the narrow range where I tested it.

Very good. They work great for my use. No problems at all, i2c bus address 0x76. just what I wanted/needed.