Esp8266-workshop

Esp8266-workshop Tue 31 May 2016 17:00 till Tue 31 May 2016 23:59 What: ESP8266 workshop Tagline: ESP8266 workshop, learn your way to add wifi to your devices. Where: HSB Brussels,Belgium Cost: 0 Who: anyone URL:

About

ESP8266 workshop, learn your way to add wifi to your devices.

Arduino IDE

You can use the Arduino IDE to upload code to the device

• https://github.com/esp8266/Arduino

Wemos D1 mini

Pinout

Participants

• zoobab (40x wemos-d1-mini, 3x witicloud, xx ESP-01)
• ptr_here (1 esp8266 thingie + group-order)
• friedger (group order)
• betz (group order)

Links

• http://www.cnx-software.com/2016/02/19/4-wemos-d1-mini-esp8266-board-supports-shields-with-a-temperature-sensor-a-button-a-relay-or-a-micro-sd-slot/
• https://nurdspace.nl/ESP8266

Notes

( during workshop : http://piratepad.be/p/esp8266-workshop -- please add to this wiki instead)

ESP8266 HSBXL 31MAY2016

Install Arduino IDE, I run v1.6.7

1.6.9 also tested

Serial drivers

linux

linux ch340g should create /dev/ttyUSB0, check "dmesg"

lsusb:

Bus 001 Device 005: ID 1a86:7523 QinHeng Electronics HL-340 USB-Serial adapter

dmesg:

dmesg: [ 5605.989191] ch341 1-1.1:1.0: ch341-uart converter detected
dmesg: [ 5605.990896] usb 1-1.1: ch341-uart converter now attached to ttyUSB0

osx

You need some "signed" drivers for ch340g (worked for us on macosx 10.10.5) http://blog.sengotta.net/signed-mac-os-driver-for-winchiphead-ch340-serial-bridge/

windoze

http://www.arduined.eu/tag/windows-7/

Follow this procedure to install the ESP8266 addon

(xcompilers etc): https://learn.sparkfun.com/tutorials/esp8266-thing-hookup-guide/installing-the-esp8266-arduino-addon

Select "Wemos D1 R2 & MINI"

We have a "wemos d1 mini" here for the workshop / easy selectable from 'boards' menu in arduino IDE

(we set baudrate to 115200 as default proposed value didn't work out on macosx)

Blink the onboard blue LED (no soldering required)

http://www.cnx-software.com/2016/03/22/getting-started-with-wemos-d1-mini-esp8266-board-dht-relay-shields/

/*
* Blink
* Turns on the onboard LED on for one second, then off for one second, repeatedly.
* This uses delay() to pause between LED toggles.
*/
 
void setup() {
  pinMode(BUILTIN_LED, OUTPUT);  // initialize onboard LED as output
}
 
void loop() {
  digitalWrite(BUILTIN_LED, HIGH);  // turn on LED with voltage HIGH
  delay(1000);                      // wait one second
  digitalWrite(BUILTIN_LED, LOW);   // turn off LED with voltage LOW
  delay(1000);                      // wait one second
}

Esp-link demo:

esplink is a firmware that provides web-based - easy config of wifi (client/AP) -monitor serial port - tcp to SLIP

http://www.zoobab.com/esp8266-serial2wifi-bridge

Wifi webserver:

minimal example of running a webserver & provide web interface to digital I/O

http://www.arduinesp.com/wifiwebserver

need to replace some accolades on line 65 to get it to compile... (unicode > text fck-up) -- exact characters to replace seems to depend on platform ?!? check

 ' " 

characters...

Power consumption: https://nurdspace.nl/ESP8266

Phant Git: https://github.com/sparkfun/phant-arduino/blob/master/src/

Socat

examples: http://technostuff.blogspot.be/2008/10/some-useful-socat-commands.html

Go to: File -> Examples -> ESP8266Wif -> WifiClientBasic

You can run a server to capture the content like this, change the IP and PORT of your laptop:

socat -u TCP4-LISTEN:3334,reuseaddr,fork OPEN:/tmp/file.log,creat,append

You should get:

zoobab@sabayonx86-64 /home/zoobab/Downloads/arduino-1.6.7 [1]# tail -f /tmp/file.log 
Send this data to server
Send this data to server
Send this data to server
Send this data to server

Deepsleep

https://github.com/esp8266/Arduino/issues/1488 "With ESP.deepSleep(0), esp will be going to sleep forever."

https://github.com/chaeplin/esp8266_and_arduino/tree/master/_48-door-alarm-deepsleep

// connect PIN D0 to RST 

#include <ESP8266WiFi.h>

// Time to sleep (in seconds):
const int sleepTimeS = 1;

void setup() 
{
 Serial.begin(115200);
  // seconds by 1e6 
  Serial.print("test\n"); // Trying to avoid using serial
 ESP.deepSleep(sleepTimeS * 1000000);
}

void loop() 
{
}

there's an elaborate example on sparkfun, which sends data every 30minutes to phantom server (some data IoT platform junk @sparkfun)

https://learn.sparkfun.com/tutorials/esp8266-thing-hookup-guide/example-sketch-goodnight-thing-sleep-mode

esp-link https://github.com/jeelabs/esp-link/releases

Flashing script:

curl -L https://github.com/jeelabs/esp-link/releases/download/v2.2.beta2/esp-link-v2.2.beta2.tgz | tar xzf -
cd esp-link-v2.2.beta2
esptool.py --port /dev/ttyUSB0 --baud 460800 write_flash -fs 32m -ff 80m 0x00000 boot_v1.5.bin 0x1000 user1.bin 0x3FE000 blank.bin

http://172.23.187.94/home.html

mosquitto_sub -h test.mosquitto.org -t "#" -v

Nodemcu

http://nodemcu.com/index_en.html#fr_5475f7667976d8501100000f

Micropython

http://www.electrodragon.com/w/MicroPython_ESP8266 No binary release to flash

pushbutton sensing & sleep

]

void setup() {
  pinMode(D3, OUTPUT);
  pinMode(D1, INPUT);
  pinMode(D2, INPUT);

  digitalWrite(D3, LOW);  // D3 is pullup, put it low to disable RST circuitry

  // D1 & D2 are pullup, so active when LOW
  
  Serial.begin(115200);

  for(int i =0; i<100;i++){
    int s1 = digitalRead(D1);  
    int s2 = digitalRead(D2);
    Serial.print("(");
    Serial.print(s1);
    Serial.print(",");
    Serial.print(s2);
    Serial.print(") ");
    delay(100);
    if(i%10==0) Serial.println("");
  }
  ESP.deepSleep(0);
}

void loop() {
  // put your main code here, to run repeatedly:
}