I need to decide on a microcontroller with Bluetooth.
the microcontroller would control one micro-miniature solenoid valve on and off, and also regulates one resistor (on and off), Bluetooth will be used to connect to a cell phone which would be used to control the valve and resistor.

The problem is power source is very small 3.7 V
Can you please suggest the smallest and lightest microcontroller for my use case?

Puck.js I can start but I feel a lot of unnecessary things for my purpose make it expensive.
Also Ardreno does not have a Bluetooth built in and the size is too big anyway.

 

MOD NOTE: Removed the "Complete Project" tag.

 

Hello and welcome. I'm not familiar with the concept of "regulating" a resistor. Can you elaborate on this? Also could explain the reference to Puck,js? What is that?

 

Sorry the regulator word will not be there. I will just have a small resistance that I just want to on and off?
Puck,js
https://shop.espruino.com/puckjs

Thank you so much!

 

Also Ardreno does not have a Bluetooth built in and the size is too big anyway.

Hi cmb,
Check out the ESP32 3.3V operation, BLE and Wi-Fi built in
.
E

 

I need to decide on a microcontroller with Bluetooth.
the microcontroller would control one micro-miniature solenoid valve on and off, and also regulates one resistor (on and off), Bluetooth will be used to connect to a cell phone which would be used to control the valve and resistor.

The problem is power source is very small 3.7 V
Can you please suggest the smallest and lightest microcontroller for my use case?

Puck.js I can start but I feel a lot of unnecessary things for my purpose make it expensive.
Also Ardreno does not have a Bluetooth built in and the size is too big anyway.

Hi P,
Look into these:
https://www.alldatasheet.com/datasheet-pdf/pdf/74968/MICROCHIP/PIC16F628A.html

https://www.ebay.co.uk/itm/282326689518
https://www.aliexpress.com/item/325...00029758632388!sea&curPageLogUid=k1PqW63cfsu8
C

 

Nordic has a lot of good choices for low power Bluetooth MCUs. The Seeed Studio XIAO nRF52840 is a very nice dev board.