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Bluetooth Low Energy Sensor with Adafruit ItsyBitsy nRF52840 and BME280 module
A bluetooth enabled switch interface and an accessible game controller interface in one device.
BLE advertising sensor node. Modified Adafruit ItsyBitsy nRF52840 with MS8607 sensor and 2.7µA deep sleep current
Sensor node as OpenThread sleepy end device.
This library enables you to use ISR-based PWM channels on an nRF52-based board using Adafruit_nRF52_Arduino core such as Itsy-Bitsy nRF52840 to create and output PWM any GPIO pin. It now supports 16 ISR-based PWM channels, while consuming only 1 Hardware Timer. PWM channel interval can be very long (ulong microsecs / millisecs). The most important feature is they're ISR-based PWM channels, supporting lower PWM frequencies with suitable accuracy. Their executions are not blocked by bad-behaving functions or tasks. This important feature is absolutely necessary for mission-critical tasks. These ISR-based PWMs, still work even if other software functions are blocking. Moreover, they are much more precise (certainly depending on clock frequency accuracy) than other software-based PWM using millis() or micros(). That's necessary if you need to control devices requiring high precision