Pytrack PWR_EN, and 3V3 External IO pins
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Hi
On the pytrack there are a few pins marked on the External IO Header;
Pin 2 PWR_EN
Pin 3 3V3_Pymodule
Pin 4 3V3_SensorsWhat are those for? Are any powered on when awake, and powered off when in Deepsleep? I am looking for a pin to power a DS18B20 ONLY when awake.
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@seb said in Pytrack PWR_EN, and 3V3 External IO pins:
Pin 3 3V3_Pymodule - This power supply is always switched on
Pin 4 3V3_Sensors - This power supply is only switched on when the Pytrack is awake, when it goes to sleep mode it turns off
Pin 2 PWR_EN - You can use this to externally toggle the sleep modeOld thread, but I need help:
The pwr_en pin is to power down the pycom board right?
Connect this pin to gnd with a button or with a switch?
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@seb brilliant. Just what i needed.
Might be worth putting that in the docs as the ability to have a pin that is only on when powered is brilliant for low power sensor nodes that want to toggle the sensors on/off with the board to save power.
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@jcaron oh gosh, sorry I've been running around like a headless chicken today.
I have updated the pin numbers in the previous post, but I have verified the functionality is definitely correct.
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@seb looks like it’s been a long week :-) You have severely mixed up the pins and their functions...
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Pin 3 3V3_Pymodule - This power supply is always switched on
Pin 4 3V3_Sensors - This power supply is only switched on when the Pytrack is awake, when it goes to sleep mode it turns off
Pin 2 PWR_EN - You can use this to externally toggle the sleep mode
