for $5 range I compared with https://minew.en.alibaba.com/product/60606212990-802524400/Factory_Direct_Sale_Anti_losting_Tracker.html with nRF51822, buzzer, on/off button that is $3 at 1000 units (that was 2 years ago)
I like the http://www.m5stack.com/ form factor - small, 320x240 LCD, stackable, easy to prototype.
another cheap round design ESP32 solution – https://www.tindie.com/products/Sandeep_ee/hornbill-esp32-minima/
just brainstorming around
@tbd started
Espruino is a JavaScript interpreter for low-power Microcontrollers. This site is both a support community for Espruino and a place to share what you are working on.
for $5 range I compared with https://minew.en.alibaba.com/product/60606212990-802524400/Factory_Direct_Sale_Anti_losting_Tracker.html with nRF51822, buzzer, on/off button that is $3 at 1000 units (that was 2 years ago)
I like the http://www.m5stack.com/ form factor - small, 320x240 LCD, stackable, easy to prototype.
another cheap round design ESP32 solution – https://www.tindie.com/products/Sandeep_ee/hornbill-esp32-minima/
just brainstorming around