Search found 43 matches

by ajocius
Mon Feb 11, 2019 9:14 am
Forum: ESP32 boards
Topic: ESP32 PIN.OUT voltage
Replies: 11
Views: 170

Re: ESP32 PIN.OUT voltage

Ok, so we established that -total power supply should not be a problem; -I would prefer to use one power supply in this project; -I should use transistor or relay to supply current to pump and use ESP32 to just control that transistor or relay -Power output from any ESP32 pin is not sufficient to dr...
by ajocius
Sun Feb 10, 2019 11:38 pm
Forum: ESP32 boards
Topic: ESP32 PIN.OUT voltage
Replies: 11
Views: 170

Re: ESP32 PIN.OUT voltage

Ok, last few questions on this subject. If I have separate power supply for my pump, I can just use simple switch to operate it. Switch would be controlled by ESP32, but current through out pins would be from external source. i am suggesting this as I used switches in past, transistors only based on...
by ajocius
Sun Feb 10, 2019 8:38 pm
Forum: ESP32 boards
Topic: ESP32 PIN.OUT voltage
Replies: 11
Views: 170

Re: ESP32 PIN.OUT voltage

I used ESP32, not ESP8266 , but I guess it has same limitation? I mentioned in first post, that I did work yesterday on another ESP32, that had no other code and no other components on breadboard. Just a simple pin.out value setting to 1 in order to start pump and then setting to zero to stop it. Pu...
by ajocius
Sun Feb 10, 2019 6:36 pm
Forum: ESP32 boards
Topic: ESP32 PIN.OUT voltage
Replies: 11
Views: 170

Re: ESP32 PIN.OUT voltage

I did measure prior connecting water pump, pin provided 3,3 V, it drops after I connect pump. I do have LD1117V33 LDO Voltage Regulators 3.3V 0.8A , but I am not sure if that is up to the job? https://www.aliexpress.com/item/10pcs-lot-LD1117V33-LD1117-LDO-Voltage-Regulators-3-3V-0-8A-Positive-new-or...
by ajocius
Sun Feb 10, 2019 5:01 pm
Forum: ESP32 boards
Topic: ESP32 PIN.OUT voltage
Replies: 11
Views: 170

Re: ESP32 PIN.OUT voltage

It is a 3V water pump like this: https://www.aliexpress.com/item/DC-Amphibious-3V-Fountain-Vertical-Small-Water-Pump-Horizontal-Submersible-Pump/32949214309.html?spm=2114.search0103.3.8.5c1f2db8dKS4lX&ws_ab_test=searchweb0_0,searchweb201602_4_10065_10068_319_10059_10884_317_10887_10696_321_322_10084...
by ajocius
Sun Feb 10, 2019 4:09 pm
Forum: ESP32 boards
Topic: ESP32 PIN.OUT voltage
Replies: 11
Views: 170

ESP32 PIN.OUT voltage

I have assigned PIN 15 to be Pin.OUT and expected to get 3,3 V output once I set value 1 for that pin. This works as expected (gives 3,3 V ) prior I connected micro pump at which point voltage drops from 3,3 V to 0,47 V and pump does not work. Tried pin 18 with the same result. Tried different pump,...
by ajocius
Wed Jan 23, 2019 9:17 pm
Forum: General Discussion and Questions
Topic: Charging 3,7v LiPo battery
Replies: 6
Views: 212

Re: Charging 3,7v LiPo battery

Thank you both!
by ajocius
Tue Jan 22, 2019 4:17 pm
Forum: General Discussion and Questions
Topic: Charging 3,7v LiPo battery
Replies: 6
Views: 212

Re: Charging 3,7v LiPo battery

Thanks, let me ask you follow up question. I understand there are two options for me: either choose 1A batteries ( I only chose 500mA as I thought that should be sufficient for low energy board like ESP8266 12E with deep sleep hopefully for a year ant it is small size) or adjust charging module or p...
by ajocius
Tue Jan 22, 2019 8:39 am
Forum: General Discussion and Questions
Topic: Charging 3,7v LiPo battery
Replies: 6
Views: 212

Charging 3,7v LiPo battery

What charger can I use to charge small Lipo battery, like this: https://www.aliexpress.com/item/shenzhen-technology-503035-3-7v-lithium-polymer-battery-3-7V-volt-li-po-ion-lipo-rechargeable/32856350210.html?spm=2114.search0104.0.0.5a0e21b32jjM8H Thinking of using this battery with ESP8266 12E, this ...
by ajocius
Sat Jan 19, 2019 5:32 pm
Forum: ESP32 boards
Topic: Main.py vs Boot.py
Replies: 1
Views: 157

Main.py vs Boot.py

Is there any general logic on what to keep in each file? Both files are executed during startup. I have seen examples where wifi connection is coded in boot.py, but also seen it in main.py, tried both options and it worked fine. Same with MQTT parameters (user name, password, ip address, etc), some ...