I'm trying to power on my NodeMCU ESP8266 Ver 0.1 (thats what is written in board), via VIN and Ground with my phone charger.
I'm 100% sure that the USB charger is working, providing 5V, and that the ground and VIN are connected to the right positions.
If I use the same phone charger via the NodeMCU USB, the program blinks the builtin led alright.
If I power via VIN, it flashes when I connect the charger to DC, but the program does not work. It seems as the NodeMCU is not powering on complety.
Bizarrely, if I short 3V and G pins, the board starts working normally as powered directly via USB port.
This is the code
/*
ESP8266 Blink by Simon Peter
Blink the blue LED on the ESP-01 module
This example code is in the public domain
The blue LED on the ESP-01 module is connected to GPIO1
(which is also the TXD pin; so we cannot use Serial.print() at the same time)
Note that this sketch uses LED_BUILTIN to find the pin with the internal LED
*/
void setup() {
pinMode(LED_BUILTIN, OUTPUT); // Initialize the LED_BUILTIN pin as an output
}
// the loop function runs over and over again forever
void loop() {
digitalWrite(LED_BUILTIN, LOW); // Turn the LED on (Note that LOW is the voltage level
// but actually the LED is on; this is because
// it is acive low on the ESP-01)
delay(1000); // Wait for a second
digitalWrite(LED_BUILTIN, HIGH); // Turn the LED off by making the voltage HIGH
delay(2000); // Wait for two seconds (to demonstrate the active low LED)
}
