SatNOGS rotator with CNC Shield and ESP8266

SatNOGS Software
1

Hi everyone,
I am using a CNC Shield which works pretty well on an Arduino UNO.
I am now trying to port the code on an ESP8266 (Wemos D1 Mini Pro) to be abble to control my rotator via Wifi.
Here is the roator_pins declaration:

#define M1IN1 D6 ///< Motor 1 PWM pin
#define M1IN2 D2  ///< Motor 1 PWM pin

#define M2IN1 D5 ///< Motor 2 PWM pin
#define M2IN2 D1  ///< Motor 2 PWM pin

#define MOTOR_EN D7 ///< Digital output, to enable the motors

#define SW1 D3 ///< Digital input, to read the status of end-stop for motor 1
#define SW2 D4 ///< Digital input, to read the status of end-stop for motor 2

But I constantly get a wdt reset on the serial monitor:

ets Jan 8 2013,rst cause:2, boot mode:(3,6)

load 0x4010f000, len 3460, room 16
tail 4
chksum 0xcc
load 0x3fff20b8, len 40, room 4
tail 4
chksum 0xc9
csum 0xc9
v000446d0
~ld

Just to ensure there is no input/output issue, I have tried to add this in Setup() but with it still fails:

    pinMode(M1IN1, OUTPUT);
    pinMode(M1IN2, OUTPUT);
    pinMode(M2IN1, OUTPUT);
    pinMode(M2IN2, OUTPUT);
    pinMode(MOTOR_EN, OUTPUT);
    pinMode(SW1, INPUT_PULLUP);
    pinMode(SW2, INPUT_PULLUP);

Any idea of what is going wrong?
73

2

wdt is watchdog, needs to be fed periodically so it doesn’t run out and reset the cpu.
if the code has a lot of sleep and blocking calls it can be good to increase the time it takes.
just feed it at least once in loop(), for 8266 I think it is ESP.wdtFeed();

3

A Similar project to yours and they give you the code if you ask. I have one up and running right now in WiFi sitting out in the snow… It’s been running for 8 months at temps down to -30C

4

Thank you for the information, I’ll dig into that.

@ve6kdx I know this project but I won’t change my hardware (the rotator is up and running with the serial port) just for adding a Wifi connection :wink:

5

Hello,
Any chance you supply a link and/or a name of your CNC Shield.
I am very interested.
Steve

6

Hi Steeve,
Sure, this is a CNC Shield V3 that you can purchase everywhere for less than $15.
Mine is fitted with two DRV8825 drivers.
Everything you need to know is described here:

SatNOGS Arduino Uno/CNC Shield Based Rotator Controller - SatNOGS Wiki

73,
JB

7

I think we went different routes in that i installed the RPi3 with a NooelecSmart SDR outside with the Rotor and used the Wifi from the RPi3 to communicate with my Router and the Satnogs Network. I liked the idea of having very little loss between the Antenna and the SDR.

Good luck with your Project.

Regards
Karl.

8

Hi JB,
Thanks for quick response, that’s the shield and drivers that I am using, works great.
Silly me misread your first post, thought it said you had a shield for the ESP8266.
Sorry about that.
Steve

9

No worry Steeve.
I am using an Arduino Proto Shield to plug the CNC Shield on an Wemos D1 mini Pro.
With some minor changes in the source code, it works like a charm with en ESP8266.
73
JB

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