With Micro-USB on board connector, you can directly connect to computer USB port for battery charging. If USB is not available you can use an external source voltage at IN+/IN- pads Great for DIY projects
ESP32 V1.0 Rev1 Lite WiFi Bluetooth Module MicroPython 4MB FLASH Wireless/IOT Applications is latest product of ESP32 with 4MB flash and MicroPython firmware. Maximum Serial Baud rate of this module is 256000bps.
This is a Pulse Oximeter and Heart rate Sensor module based upon Maxim's MAX30100 integrated IC which is an compact low cost integrated solution for measuring Heart Rate as well as Pulse oximeter.
The MAX30102 is an integrated pulse oximeter and heart rate monitor bio sensor module. It integrates a red LED and an infrared LED, photo detector, optical components, and low-noise electronic circuitry with ambient light suppression.