Espruino
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.
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.
Hi guys. First of all I want to thank Gordon, fanoush, enaon, jeffmer, yngv126399 for your contribution to this fascinating world of open source watches. It's a great hobby for me.
Unfortunately in my region it's not so easy to buy bangle js 2, delivery time is 3 months and the cost is 35 times! more expensive than P8 or P22. That's why I bought P8 and P22. Everything is fine, but the SPI speed is not enough for fast screen update. Now I'm trying to figure out TK78G on nfr52840, it's a little faster. But watches on Nordic chips are almost completely disappearing from sale.
Now there are many watches on RTL8762 chip (ARM Cortex-M4) on sale. Full documentation and SDK are available, on freertos. Programming by uart. I bought one such watch leef planex. Easy to disassemble, there are UART pads on the board for programming, a large display and fast display update (maybe there is an i8080 parallel interface, the chip supports it). There is also an amplifier for audio and microphone. The cost is the same as P8. Unfortunately, my knowledge of hardware is not enough to figure out this watch on my own, much less port espruino to it. But it seems to me that together we could do it.
Here are some useful links on RTL8762:
Official documentation and SDK of the manufacturer
rtl8762c ble uart
rtl8762c gcc examples