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esp-wifi-manager.js
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const wifi = require('Wifi');
const f = new (require("FlashEEPROM"))();
//Library for instant feedback using a led
export L={
init:(pin)=>{
L.pin=pin
},
write:(w)=>{
digitalWrite(L.pin,w);
},
reset:()=>{
if(L.i){
clearInterval(L.i);
L.i=undefined;
}
},
turn:(s)=>{
L.reset()
L.write(!s);
},
blink:(times,t=500)=>{
L.reset();
L.ledOn=false;
L.times=0;
L.i=setInterval(()=>{
L.write(L.ledOn);
L.ledOn=!L.ledOn;
L.times=L.times+1;
if(L.times==times*2){
L.reset()
}
},t)
}
}
export default C={
handleRequest: (req,res)=>{
if (req.method=="POST") {
req.on("close", function(){
obj=C.parse(req.read())
if(obj.s){
setTimeout(() => {
wifi.stopAP();
C.start_wifi(obj.s, obj.p);
L.turn(false);
}, 3000)
}
})
res.writeHead(200);
res.end(`<html><h2>You can now close this page and restore your Wi-Fi connection.</h2></html>`);
}else{
wifi.scan(ns => {
let out=`<html><style>body *{font-size:24px;padding:8px;display:block;}</style><meta name="viewport" content="width=device-width, initial-scale=1"><form method="POST" action="/"><label for="s">Choose Wifi</label><br/><select name="s" id="s">`
out=out+ns.map(n => '<option value="'+n.ssid+'">'+n.ssid+'</option>');
out=out+`</select><label>Password</label><input id="p" name="p" type="text"/><input type="submit" value="save"></form>`;
out=out+"</html>"
res.writeHead(200);
res.end(out);
});
}
},
parse:(s)=>{
return s.split("&").reduce((prev, c)=> {
let p = c.split("=");
prev[decodeURIComponent(p[0])] = decodeURIComponent(p[1]);
return prev;
}, {});
},
start_setup:()=>{
C.reboot=false;
print(process.memory());
wifi.setHostname("espruino-wifi")
wifi.startAP("espruino-wifi", {}, err => {
require("http").createServer(C.handleRequest).listen(80);
L.turn(true)
print(process.memory());
})
},
check_wifi:()=>{
var ct=setInterval(()=>{
wifi.getDetails(obj =>{
console.log(obj.status);
print(process.memory());
if(obj.status=="no_ap_found" || obj.status=="wrong_password" || obj.status=="off" || obj.status=="connect_failed"){
C.error()
clearInterval(ct);
}
if(obj.status=="connected"){
clearInterval(ct);
}
})
},1000)
},
error:()=>{
console.log("ERROR")
if(C.pin){
C.reboot=true;
print(process.memory());
L.blink(2, 700);
setTimeout(()=>{
if(C.reboot){load()};
}, 10000)
}else{
C.start_setup();
}
},
start_wifi:(ssid, passw, callback)=>{
C.check_wifi()
L.turn(true)
if(ssid){
wifi.connect(ssid, { password: passw}, function(error) {
if(error){
//Bad Password
C.error();
}else{
console.log(`Connected to: ${ wifi.getIP().ip }`)
if(callback){
callback()
L.blink(5)
}else{
f.erase();
f.write(0, ssid);
f.write(1, passw);
//I have the right ssid and pass, reboot
console.log("rebooting...")
load()
}
}
});
}
},
read:(pos)=>{
let p=f.read(pos);
return (p!=undefined ? E.toString(p) : undefined)
},
init:(led, cb)=>{
L.init(led);
C.check_wifi();
let ssid=C.read(0)
let pass=C.read(1)
console.log("saved ssid:", ssid)
console.log("saved pass:", pass)
start_wifi(ssid, pass, function(){
callback()
})
wifi.on("disconnected", C.error);
},
setupPin:(pin)=>{
C.pin=pin;
pinMode(pin, 'input_pullup');
setWatch(C.start_setup, C.pin, { repeat: true, edge: 'falling', debounce: 50 });
}
}