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- the red wire is not connected to anythingjsotola– jsotola2020-08-04 06:42:29 +00:00Commented Aug 4, 2020 at 6:42
- you mean the Main power Red wire right ?I removed the connection to take photo..GK_– GK_2020-08-04 07:08:23 +00:00Commented Aug 4, 2020 at 7:08
- What version of the NodeMCU is that?Majenko– Majenko2020-08-04 09:55:33 +00:00Commented Aug 4, 2020 at 9:55
- On back of board it mentioned, "Node MCU V3" and in front top right corner , ver 0.1GK_– GK_2020-08-04 10:49:25 +00:00Commented Aug 4, 2020 at 10:49
- 1Does the relay work when you connect IN4 to Vcc ?SBF– SBF2020-08-04 15:14:50 +00:00Commented Aug 4, 2020 at 15:14
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