Adressing LEDs – NodeMCU vs. Espruino

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Oct 302016
 

Previously I made LEDs on/off via Lua. The pin-order was 4, 3, 2, 1, 5, 0, 6, 7, 8 in NodeMCU: 6 red LEDs, and a RGB LED.

Using Espruino (specifically version 1.87), the order turns out to be: D2, D0, D4, D5, D14, D16?, D12, D13, D15. D1 seems to turn the WiFi LED on/off, which is a bit odd.

 

Update:

Espruino has a nice feature to convert NodeMCU pins into Espruino pins:

for (var i=1; i<11; ++i) { console.log(NodeMCU["D"+i])}
D5
D4
D0
D2
D14
D12
D13
D15
D3
D1

Or easier, just use NodeMCU.D1 for what was D1 in NodeMCU. It also helps to know that the Espruino numbers are simply the GPIO numbers of the ESP8266 (Espruino D5 = ESP8266 GPIO 14 = NodeMCU D1)

Espruino on ESP8266

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Oct 302016
 

Lua is neat, but learning Lua and JavaScript and NodeJS. Although Lua and especially NodeMCU is similar (not only in name) to NodeJS, it would be nicer to use only one language.

Here the recipe:

  1. Download espruino_1v87.tve_master_b3dc05b_esp8266.tgz
  2. Write flash (note: might use 80m and qio, but my old one does dio): 
    ./esptool.py --port /dev/ttyUSB0 --baud 115200 write_flash --flash_freq 40m --flash_mode dio --flash_size 32m \
0x0000 ~/Downloads/espruino_1v87.tve_master_b3dc05b_esp8266/boot_v1.6.bin \
0x1000 ~/Downloads/espruino_1v87.tve_master_b3dc05b_esp8266/espruino_esp8266_user1.bin \
0x3FC000 ~/Downloads/espruino_1v87.tve_master_b3dc05b_esp8266/esp_init_data_default.bin \
0x37E000 ~/Downloads/espruino_1v87.tve_master_b3dc05b_esp8266/blank.bin
  3. Verify it: 
    ./esptool.py --port /dev/ttyUSB0 --baud 115200 verify_flash \
0x1000 ~/Downloads/espruino_1v87.tve_master_b3dc05b_esp8266/espruino_esp8266_user1.bin \
0x3FC000 ~/Downloads/espruino_1v87.tve_master_b3dc05b_esp8266/esp_init_data_default.bin \
0x37E000 ~/Downloads/espruino_1v87.tve_master_b3dc05b_esp8266/blank.bin
  4. Connect at 115200bps.
  5. Connect to your AP: 
    var wifi = require("Wifi");
wifi.connect("your_sid", {password:"your_password"}, function(err){
 console.log("connected? err=", err, "info=", wifi.getIP());
});
wifi.stopAP();
wifi.save();
  6. In the Espruino IDE add the IP address
  7. When you reconnect via Espruino IDE, you should now have 2 choices: serial or TCP/IP via WLAN