Actually works now

Makefile

@@ -0,0 +1,35 @@
+#!/bin/bash
+
+# When this baud does not work, try 115200
+FLASH_BAUD := 250000
+
+# Image to flash
+FLASH_IMAGE := sumofirmware.bin
+
+# Try to automatically find the serialport
+SERIAL_PORT := $(shell find /dev -iname "tty*usb*")
+
+all: erase flash delay config update reset
+
+delay:
+	sleep 3
+
+reset:
+	esptool.py -p $(SERIAL_PORT) --after hard_reset read_mac
+
+update:
+	ampy -d 0.5 -p $(SERIAL_PORT) put main.py
+	ampy -d 0.5 -p $(SERIAL_PORT) put boot.py
+
+config:
+	ampy -d 0.5 -p $(SERIAL_PORT) put config.json
+
+erase:
+	esptool.py -p $(SERIAL_PORT) -b $(FLASH_BAUD) erase_flash
+
+flash:
+	esptool.py -p $(SERIAL_PORT) -b $(FLASH_BAUD) write_flash --flash_size=detect -fm dio 0 $(FLASH_IMAGE)
+
+serial:
+	picocom --baud 115200 -q $(SERIAL_PORT)
+

README.md

@@ -0,0 +1,5 @@
+# SumoRobot Remote firmware
+
+Uses stock MicroPython firmware running on ESP8266 Wemos D1 Arduino or D1 Mini
+
+* https://micropython.org/download/ESP8266_GENERIC/

boot.py

@@ -13,6 +13,7 @@ with open("config.json", "r") as config_file:
 
 
 remoteName = "Remote-"+config["remote-id"]
+print("remoteName", remoteName)
 
 ap_if = network.WLAN(network.AP_IF)
 ap_if.active(False)
@@ -24,6 +25,7 @@ wlan.config(dhcp_hostname=remoteName)
 # If not already connected
 if not wlan.isconnected():
     # Scan for WiFi networks
+    print("Scan")
     networks = wlan.scan()
     # Go trough all scanned WiFi networks
     for network in networks:
@@ -32,6 +34,7 @@ if not wlan.isconnected():
         # Check if the SSID is in the config file
         if ssid in config["wifis"].keys():
             # Start to connect to the pre-configured network
+            print("Connecting")
             wlan.connect(ssid, config["wifis"][ssid])
             break
 

main.py

@@ -18,11 +18,14 @@ while True:
     try:
         sockaddr = socket.getaddrinfo('sumo-%s' % config["remote-id"], 44444)[0][-1]
     except OSError:
+        print("failed to resolve sumo-%s" % config["remote-id"])
         sleep_ms(500)
     else:
         break
 
-#    sockaddr = "192.168.1.255", 44444
+#sockaddr = "100.101.100.70", 44444
+
+print("Sending packets to", sockaddr)
 
 while True:
     msg = "%d:%d:%d" % (adc.read()-calibration, not forward.value(), not backward.value())