Need help wiring with esp32 and bmp280

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n27
LED-Curious
LED-Curious
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Hello there, as you can tell from my introduction I am pretty inexperienced in wiring and such and I was wiring 3 esp32 to 3 bmp280 sensors and for 2 of them no problem, but for the one I am already using for controlling the relays as in the ledgardener videos I have a question..
So the question is, on my esp the 3.3v pin is already used by the relay board, and i would like to add the bmp280 which uses one 3.3v too.. Do I need another step-down board to do the 3.3 line or can I give from the esp 3.3v to the relay and the bmp280 as well? I mean 2 wires from one 3.3v pin.. Sorry if I explained bad and my bad english :lol:
And I tryed to search on the forum and did not find a post about this but if it is present I will delete and apologize.. Thx a lot to anyone who will help..
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n27
LED-Curious
LED-Curious
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I think I understood, in the control box in the LEDG video he uses a breadboard so he can have multiple things connected to the 3.3v pin of the esp32, as soon I get the breadboard I will try.
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LEDG
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Yup, you can use that one pin to power multiple things with a breadboard. You're using 3.3V for your relay board? How are you powering your ESP? If you're powering your ESP32 with 5V and the relays are 5V relays, you'll want to use the VIN pin of the ESP to run the relays rather than the 3.3V pin.
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n27
LED-Curious
LED-Curious
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I wired like in your last video, but now I will add the bme280 to the control box so will need the breadboard to get a 3.3v for it, could you please share your mega 2560 and esp from the control box configuration? I have now all the electric components of the control box and I am kinda lost, so much wiring between the pump motors, pwm regulators, esp32, mega 2560, tentacle, Atlas ph and ec probes, flood sensor, any way I could contact you like in whatsapp or telegram or wikr?
Last edited by n27 on Sat Sep 26, 2020 9:30 am, edited 1 time in total.
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n27
LED-Curious
LED-Curious
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Joined: Thu Sep 03, 2020 3:32 pm

Here is the control box, I am trying to fit all the components but had to rearrange the order beacouse the box is smaller than your's..
https://ibb.co/RH9cJhR
https://ibb.co/cTjJ2WD
https://ibb.co/MRmZm2R
https://ibb.co/BPm62bb
https://ibb.co/vzCdFD5
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