[Support Request]:

[uli-2016]

Version

Current v´Version

Issue description

I am using an ESP8266 D1 mini. When the DCC signal is applied to GPIO2 / D4, the ESP does not boot. Is another PIN better suited ?

thanks

Hardware

ESP8266 D1 mini

[Neil-McK]

Hi Uli,
Pin D4 / GPIO2 (not D2 / GPIO4 as I first read it) is connected to the on-board LED, according to the pinout diagram for the D1-Mini at https://randomnerdtutorials.com/esp8266-pinout-reference-gpios/. It actually says that the device won't boot if this is pulled low. If you're not using a display and you comment out the #define USE_OLED in the Config.h you could use either pin D1/GPIO5 or D2/GPIO4. Otherwise it looks like there aren't any other options, unless you add some clever external circuitry to keep the pin disconnected until the boot process has completed. In that case you may be able to use pin D0, D3 or D4.

[Neil-McK]

Incidentally, I believe the recommended opto-isolator circuit uses a pull-up, so will be high state if the opto is off. So if the device isn't connected to the track when you power on the D1 Mini, the input should be High, and D4 should work fine. You can then connect the device to the track. A more elaborate solution would be to use the enable input of the 2N617 opto to ensure that the input to the D1 Mini is kept pulled up until the controller has booted.

[uli-2016]

Hi Neil, GPIO2 on ESP8266 is the Pin D4. I did some research and found this documentary. I have #define INPUTPIN 12 # D6 / GPIO 12 and it seems to work. https://randomnerdtutorials.com/esp8266-pinout-reference-gpios/ Thanks Von: Neil McKechnie Gesendet: Donnerstag, 23. März 2023 17:58 An: DCC-EX/DCCInspector-EX Cc: Uli; Author Betreff: Re: [DCC-EX/DCCInspector-EX] [Support Request]: (Issue #16) Hi Uli, Pin D2 on the ESP8266 D1-Mini appears to be connected to GPIO4, which is by default configured for an OLED display attached to I2C. If you modify the Config.h file and disable the OLED, then pin D2 ought to be OK. Find the line #define USE_OLED and comment it out so it looks like // #define USE_OLED Recompile and upload, and you should hopefully find that it will boot. — Reply to this email directly, view it on GitHub, or unsubscribe. You are receiving this because you authored the thread.Message ID: ***@***.***>

…

-- Diese E-Mail wurde von Avast-Antivirussoftware auf Viren geprüft. www.avast.com