GPIO Pins not working for Relays

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GPIO Pins not working for Relays

undefinedbrewing

Morning, relay's aren't working with my 8266 board and it keep saying it can't be connected to. Any tips? I know that GPIO are working because the relay's work with a different sketch and the DS18B20 I have connected works within Brewbench.

Thanks!

BrandonLee

Hi. Did you find a solution to this issue? I seem to be having the exact same problem with the 8266 board. The DS18B20 works perfectly but not my relays. I keep getting this error:

Connection error: http://192.168.0.111/arduino/digital?dpin=D2&value=1

Thanks

BrandonLee

So I bought a new esp2266mod board today and have the same issue. However, I realized the SS relay is rated 5v input, so I'm wonder if the issue is because it's not a 3v input SS relay?

BrandonLee

Hi all,

So spend many hours again troubleshooting. Things I've tried:
Install previous IDE version(from 2018) on new PC, reloaded all driver etc
Used the exact same ESP8266MOD board and drivers as stated in tutorial
Tried previous Brewbench builds ie v4.1.0 all the way to v4.2.0
Used an LED on D1/D2 ports to see if it lights up and communicates

Installed a simple sketch to confirm D1,D2 ports are working via webserver/URL(tested 100%)

Not too sure what else to try other than buying an Arduino Yun.

BrandonLee

.... anyone with any ideas? Thanks

Penfolds

Hi BrandonLee,
I don’t use brewbench, I was going to give it a try... I’m also just a beginner on Arduino, so apologies if this is not very helpful or down the wrong path...

Have you put a multi meter across your SSR dc input?
If the issue is the Arduino pin is insufficient voltage to trigger the SSR the you can add a Emitter Follower Relay Switch Circuit. Here’s an example on this page
https://www.electronics-tutorials.ws/blog/relay-switch-circuit.html

The idea is use a seperate 5 or 12 v power supply with the 3v triggering the transistor to complete the ssr circuit with the higher voltage.

BrandonLee

Penfolds: Thanks for the reply.
I did try a LED across pins(tried all the outputs) to see if there was any light with the software send a trigger. The LED remained "dead" I've also since purchased a Fotek SSR 25A with 3v input however I've yet to try it with the Arduino. As an interim, I've simply wired the SSR with a W1209 Thermostat module to regulate the boil element. It does the job for now until I can get the Arduino working.
If you do attempt Brewbench with an ESP8266MOD I'd to happy to hear your results.
Thanks