Search found 49 matches

by ajocius
Fri Apr 12, 2019 2:39 pm
Forum: ESP32 boards
Topic: ESP32 sensors for greenhouse
Replies: 2
Views: 70

Re: ESP32 sensors for greenhouse

Good point, but I have too many available inputs on ESP32, so thought will be easier to control and code it
by ajocius
Fri Apr 12, 2019 1:30 pm
Forum: ESP32 boards
Topic: ESP32 sensors for greenhouse
Replies: 2
Views: 70

ESP32 sensors for greenhouse

I have made drawing for intended new PCB that will hold several sensors to monitor temperature at various locations of greenhouse and one switch that will control heater (when temperature drops below set during the night). I would appreciate your comments, suggestions on Additional elements like cap...
by ajocius
Mon Mar 18, 2019 3:12 pm
Forum: General Discussion and Questions
Topic: Developing PCB layout
Replies: 5
Views: 241

Re: Developing PCB layout

Thanks, I do have basic understanding from school, just like you described: (Like what is a resistor, what is a capacitor? Basic laws, like U = R * I and stuff like that?). I did also soldered several projects, but only following predefined set of components and layout. I have read about Fritzing an...
by ajocius
Mon Mar 18, 2019 11:51 am
Forum: General Discussion and Questions
Topic: Developing PCB layout
Replies: 5
Views: 241

Developing PCB layout

I know this is not direct Micropython question, but related. I do not have knowledge about PCB layout build up. I follow instructions I find online, add capacitors, resistors or other elements as described. However I do not have understanding why do we need them and if I can use element with slightl...
by ajocius
Tue Feb 26, 2019 1:00 pm
Forum: General Discussion and Questions
Topic: ESP32 loosing connection to mqtt server
Replies: 0
Views: 72

ESP32 loosing connection to mqtt server

I am using Micropython on ESP32 board that has few sensors connected. The task for ESP32 is to read sensors and send data to MQTT server. I got it all working, however process used do stop unexpectedly. Sometimes it happens once a week, sometimes it kept stable for few weeks. I was only guessing tha...
by ajocius
Tue Feb 26, 2019 12:14 pm
Forum: ESP32 boards
Topic: uPyCraft looses connection to ESP32
Replies: 10
Views: 683

Re: uPyCraft looses connection to ESP32

Not sure I follow your solution... boot.py should remain unchanged on ESP32 board. Were are you renaming it and why?
by ajocius
Mon Feb 11, 2019 9:14 am
Forum: ESP32 boards
Topic: ESP32 PIN.OUT voltage
Replies: 11
Views: 350

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: 350

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: 350

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: 350

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...