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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.
@Alex
Hi All,
I have (a probably stupid) question about hooking up a HM-10 to the espruino. From the BLE example, it states that "In order to use pin 23, connect this pin via a switch to ground (defaul position of the switch is open). Also connect this pin via a resistor of 1k to 3.3V."
My question is: why can't I just connect pin 23 to any GPIO pin of the espruino? The idea is to have 3.3V go into the HM-10 if the pin is off and to have it grounded when the pin is on right? Wouldn't you have that with the GPIO off (ground) and the GPIO on (v-in)?
I'm not too familiar with hardware so if anyone could please clarify this for me I'd be very grateful. Also, I assume a 470R resistor is a 470 Ohm resistor?
EDIT: why does it have to specifically be a 470? Would a 1K work?
Regards,
Alex