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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.
@fanoush
Just to let you know that I managed to get also DS-D9 bracelet . This is the one I got firmware update for by mistake when I modified DS-D6 version/model number inside firmware and after update it worked inside DS-D6 except display layout. And indeed it is almost the same as DS-D6 internally, same pinout. Same espruino code works, flashed over serial without opening it, still figuring out display memory layout (SSD1306, probably 64x32). Too bad it is even harder to get than DS-D6. However I like its minimalistic design. Got black one. The seller is here but already raised price (I got it for 11.99) and went out of stock.
EDIT: from FCC's "Declaration Letter of Model Difference" it says that DS-D9 is identical to Lenovo HW02 (Plus). This one is sold in many places and indeed looks the same but the price is just insane for what is is (small OLED).