Running an example script (moving rainbow) works perfect. Test 1: When powering both the Nano 33 IoT (via the main micro usb port) and the LED strip (power from the Nano's VIN, ground from Nano's ground) from a laptop's usb port, everything works as expected. LED strip gets SPI clock and data from the Nano hardware clock and data pins (11, 13). Both the Nano and the LED strip take power and ground directly from the pololu converter's output (that was the main intended advantage of this setup).Individually addressable APA102 LED strip, only 7 pixels (less than 1A), takes 5V input.Pololu D36V28F5 5V, 3.2A Step-Down Voltage Regulator - accepts 50V max, outputs steady 5V (3.2A max).10s LiPo battery (42V max, 30V min voltage).I'm trying to figure out how to power the Nano 33 IoT and an LED strip via a buck converter from a LiPo battery. It is the successor to sensors such as the BMP180, BMP085 and BMP183.I've been going in circles trying to figure this out and it's just gotten more confusing. Hardware Overview BME280 ICĪt the core of the module is the next-generation digital temperature, humidity, and pressure sensor from Bosch – BME280.
So, to get an accurate absolute altitude measurement, the SEA_LEVEL_PRESSURE constant is provided in the example code below, which you should update with the current sea level pressure at your location. However, if you’re trying to measure absolute altitude, things become a bit more complicated because the BME280 needs to know the current sea level pressure. For example, if you know the altitude of an object sitting on a table and you move it to the floor, the BME280 will show a 2 foot decrease in height. Because the BME280 is very good at measuring pressure, it can calculate relative altitude accurately. Note that the BME280 cannot directly measure altitude but can estimate it using pressure readings.
The term “absolute altitude” refers to the height above sea level (MSL), whereas “relative altitude” refers to the height above ground level (AGL).
The BME280 can measure pressure with such precision (low altitude noise of 0.25m) that it can also be used as an altimeter with an accuracy of ☑ meter.īefore proceeding, it is important to understand the distinction between Absolute and Relative Altitude.
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