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Topic: nodemcu and rfm69HW-S2 (Read 615 times) previous topic - next topic


you may have fried your radio. VIN on a nodeMCU is 5V!!
Vin is at whatever voltage externally supplied to that pin; it does not get any voltage from the NodeMCU if it's powered through another pin.

You're probably thinking of VU, which is the USB voltage, and which only can supply power if the NodeMCU is connected to the USB.
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