ChampaRando
Member
Hi guys. Again some newbie questions.
So I finally got some time after few months of being busy. So I have received my ESP32 a while back, I bought a LiFePO4 Powerbank (it says its 313Wh but from my testing and current measurements its roughly 260Wh or something; yes i know there is energy loss but still, anyways - still heaps more than overpriced Cellinks).
So I was planning to use my ESP32 to build a cool system. I will try to cut off my dashcam at 20% SOC for the Lifepo4, which equates to around 12.8V. So some issues I have, most dashcams (infact all, my U1000, Viofo A139) have cutoffs from like 11.8-12.4v. According to my research, 12.4v is NOT 20% SOC for LifePo4s so I thought to use my ESP32 to monitor voltage using a voltage sensor (ordered 10pcs off Ebay
). So now I need a relay to actually cut power from the dashcam using my ESP32. I've seen tutorials on the web, that use ESP32 to make a Wi-Fi Switch and all and they use "5V SPDT Relays". Something like this (https://www.ebay.com.au/itm/224345421381).
But I have also seen some 12v relays, exactly the same, for example these ones (https://www.ebay.com.au/itm/224642336798). So the main question here is, which one do I exactly need? Because online tutorials are controlling devices even like fans and other things which obviously use more than 5V from the mains electricity, all this by using 5V relays and ESP32. So I thought I'd use what they used, but having seen there are 12V relays for ESP32 as well, do I need the 5V or 12V? Because the powerbank I have has a 12V output, so i will just plug that into my hardwire kit using splicing, and throw this relay in the middle as a middleman with ESP in the middle too, controlling it. So if I am getting 12V to the relay and through to the hardwire box/U1000, don't I need the 12V version? or 5v?
Got no idea Appreciate if anyone has an idea.
Thanks people.
So I finally got some time after few months of being busy. So I have received my ESP32 a while back, I bought a LiFePO4 Powerbank (it says its 313Wh but from my testing and current measurements its roughly 260Wh or something; yes i know there is energy loss but still, anyways - still heaps more than overpriced Cellinks).
So I was planning to use my ESP32 to build a cool system. I will try to cut off my dashcam at 20% SOC for the Lifepo4, which equates to around 12.8V. So some issues I have, most dashcams (infact all, my U1000, Viofo A139) have cutoffs from like 11.8-12.4v. According to my research, 12.4v is NOT 20% SOC for LifePo4s so I thought to use my ESP32 to monitor voltage using a voltage sensor (ordered 10pcs off Ebay
). So now I need a relay to actually cut power from the dashcam using my ESP32. I've seen tutorials on the web, that use ESP32 to make a Wi-Fi Switch and all and they use "5V SPDT Relays". Something like this (https://www.ebay.com.au/itm/224345421381).But I have also seen some 12v relays, exactly the same, for example these ones (https://www.ebay.com.au/itm/224642336798). So the main question here is, which one do I exactly need? Because online tutorials are controlling devices even like fans and other things which obviously use more than 5V from the mains electricity, all this by using 5V relays and ESP32. So I thought I'd use what they used, but having seen there are 12V relays for ESP32 as well, do I need the 5V or 12V? Because the powerbank I have has a 12V output, so i will just plug that into my hardwire kit using splicing, and throw this relay in the middle as a middleman with ESP in the middle too, controlling it. So if I am getting 12V to the relay and through to the hardwire box/U1000, don't I need the 12V version? or 5v?
Got no idea
Appreciate if anyone has an idea.Thanks people.
