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String Height

in JavaScript • 8 years

It didn't occur to me that the value for setFontVector was the height, the reference just says size. Thanks

Nokia or oled on nodemcu - hardware connections

in ESP8266 • 8 years

I've also had it working with an I2C OLED, the SSD1306, here's that code:

function draw(){
  g.clear();
  g.drawString("Hello World",0,0);
  g.flip();
}

I2C1.setup({scl:NodeMCU.D4,sda:NodeMCU.D3});
var g = require("SSD1306").connect(I2C1, draw);

Display     NodeMCU     ESP-12

SCL			D4			GPIO2
SDA			D3			GPIO0
GND         GND         GND
VCC         3V3         3V3

These should probably be put on some wiki somewhere.

Nokia or oled on nodemcu - hardware connections

in ESP8266 • 8 years

I've had it working. This is the code I used for a Nokia 5110 aka the PCD8544

SPI1.setup({ sck:NodeMCU.D5, mosi:NodeMCU.D7 });
var g = require("PCD8544").connect(SPI1, NodeMCU.D2 /* RS / DC */, NodeMCU.D8 /* CS / CE */, NodeMCU.D1 /*RST*/, function() {
  g.clear();
  g.setRotation(2); //Flip display 180
  g.drawString("Hello",0,0);
  g.drawLine(0,10,84,10);
  g.flip();
});

Display		NodeMCU		ESP-12

LED         3V3			3V3
SCLCK       D5			GPIO14
DN<MOSI>    D7			GPIO13
D/C         D2			GPIO04
RST         D1			GPIO05
SCE         D8			GPIO15
GND         GND			GND
VCC         3V3			3V3

String Height

in JavaScript • 8 years

Is there an equivalent of .stringWidth but for height? Would be useful for scaling text despite the selected font.
Best Way To Detect Missing JSON?

in JavaScript • 8 years
I'm parsing some JSON data from a web-server but in-case the server is down or returns something unexpected I want my code to do something safe. I tried checking if the data was undefined but that produces the error:

Uncaught Error: Field or method "Hostname" does not already exist, and can't create it on undefined

So next I tried data.hasOwnProperty but this isn't implemented in Espruino's implementation of JSON :/
So I resorted to try catch which works just fine. Was this the right thing to do or should Espruino have some sort of has for JSON?
New Espruino Board

in Electronics • 8 years

Oh actually I don't suppose it matters, apparently none of the extra pins on the ESP-12E are actually useful :/
New Espruino Board

in Electronics • 8 years

Just curios what skew will the ESP be on the WiFi board? Base ESP-12, ESP-12E, ESP-12Q or ESP-12F?
Question about Espruino Pico Deep Sleep Mode / Workaround to Read reliable sensor output with a Transistor

in Electronics • 8 years

What sort of current capacity do you need? Depending on that I believe you could just pick any of these, just select the "Continuous Drain Current Id" filter to above what you need .

WebSocket Interactive UI

in Projects • 8 years

@Gordon Thanks, using a separate request for the script solved that. Now memory usage looks like this before and after the clients connection.

>process.memory();
={ "free": 769, "usage": 631, "total": 1400, "history": 551 }
[WS] "40"
>process.memory();
={ "free": 559, "usage": 841, "total": 1400, "history": 199 }

New Code

var page = '<body style="width:100%;height:100%;overflow:hidden;"><svg style="width:100%;height:100%;"  viewbox="0 0 500 500" id="svg"><path style="fill:#80e5ff;fill-opacity:1;fill-rule:nonzero;stroke:none" d="M 250 0 C 111.92882 3.7895613e-14 0 111.92882 0 250 C -1.249508e-14 341.05067 48.689713 420.72528 121.4375 464.4375 L 154.625 409.40625 C 100.50052 376.95218 64.28125 317.69934 64.28125 250 C 64.28125 147.43284 147.43284 64.28125 250 64.28125 C 352.56716 64.28125 435.71875 147.43284 435.71875 250 C 435.71875 317.53896 399.66155 376.65256 345.75 409.15625 L 378.71875 464.34375 C 451.37991 420.61135 500 340.98541 500 250 C 500 111.92882 388.07118 -1.8947806e-14 250 0 z " id="ring"/> <rect style="fill:#ffffff;fill-opacity:1;fill-rule:nonzero;stroke:none" id="needle" width="16" height="80" x="242"/> <text xml:space="preserve" style="font-size:122.59261322px;font-style:normal;font-variant:normal;font-weight:normal;font-stretch:normal;text-align:center;line-height:125%;letter-spacing:0px;word-spacing:0px;text-anchor:middle;fill:#000000;fill-opacity:1;stroke:none;font-family:Helvetica;-inkscape-font-specification:Helvetica" x="250.01915" y="845.31812" id="text"><tspan id="label" x="250.01915" y="292.95594">0</tspan></text> <path style="fill:#d5f6ff;fill-opacity:1;fill-rule:nonzero;stroke:none" id="up" d="m 294.75099,133.39225 -90.93056,0 45.46528,-78.748173 z" transform="matrix(0.61903879,0,0,0.61903879,95.682477,91.16682)" /> <path transform="matrix(0.61903879,0,0,-0.61903879,95.682477,408.80767)" d="m 294.75099,133.39225 -90.93056,0 45.46528,-78.748173 z" id="dn" style="fill:#d5f6ff;fill-opacity:1;fill-rule:nonzero;stroke:none" /></svg><script src="/interact.js"></script></body>';
var script = 'var ws=new WebSocket("ws://"+location.host,"protocolOne"),timestamp=Date.now(),pos=50,dragging=!1;function $(a){return document.getElementById(a)}function setPos(a){0>a&&(a=0);100<a&&(a=100);pos=a;100<Date.now()-timestamp&&(timestamp=Date.now(),ws.send(pos));$("label").textContent=pos;a=2.8*(pos-50);$("needle").setAttribute("transform","rotate("+a+" 250 250)")}setPos(pos);function dragStart(){dragging=!0;$("ring").style.fill="#ff0000"}document.addEventListener("mousemove",function(a){if(dragging){a.preventDefault();var b=$("svg");setPos(Math.round(180*Math.atan2(a.clientX-b.clientWidth/2,b.clientHeight/2-a.clientY)/Math.PI/2.8+50))}});document.addEventListener("mouseup",function(a){dragging=!1;$("ring").style.fill="#80e5ff";$("up").style.fill="#d5f6ff";$("dn").style.fill="#d5f6ff"});function touchHandler(a){var b=a.changedTouches[0],c="";switch(a.type){case "touchstart":c="mousedown";break;case "touchmove":c="mousemove";break;case "touchend":c="mouseup";break;default:return}var d=document.createEvent("MouseEvent");d.initMouseEvent(c,!0,!0,window,1,b.screenX,b.screenY,b.clientX,b.clientY,!1,!1,!1,!1,0,null);b.target.dispatchEvent(d);a.preventDefault()}document.addEventListener("touchstart",touchHandler,!0);document.addEventListener("touchmove",touchHandler,!0);document.addEventListener("touchend",touchHandler,!0);document.addEventListener("touchcancel",touchHandler,!0);$("ring").onmousedown=dragStart;$("needle").onmousedown=dragStart;$("up").onmousedown=function(a){a.preventDefault();this.style.fill="#00ff00"};$("dn").onmousedown=function(a){a.preventDefault();this.style.fill="#ff0000"};$("up").onmouseup=function(a){setPos(pos+10)};$("dn").onmouseup=function(a){setPos(pos-10)};';

function onPageRequest(req, res) {
  var a = url.parse(req.url, true);
  if(a.pathname == "/interact.js"){
    res.writeHead(200, {'Content-Type': 'application/javascript'});
    res.end(script);
  }else{
    res.writeHead(200, {'Content-Type': 'text/html'});
    res.end(page);
  }
}

var server = require('ws').createServer(onPageRequest);
server.listen(8000);
server.on("websocket", function(ws) {
    ws.on('message',function(msg) { print("[WS] "+JSON.stringify(msg)); });
    ws.send("Hello from Espruino!");
});

WebSocket Interactive UI

in Projects • 8 years

NOTE: This done with an ESP-12E running Espruino on the latest Travis builds of User1 and User2 as they include crypto support which is needed for the WebSocket Server.

This is an example of using WebSockets for real-time interaction, it is adapted from the Interactive Web UI example. The Espruino acts as both the WebSocket Server and a web server to serve the page to the client.

The code for the webpage for this client is in this Gist on GitHub as it was too large to fit on the forum. This code send the value over a WebSocket every time the value is updated instead of sending a POST request when the mouse is lifted like the Interactive Web UI demo.

The Espruino code is just below (New Code in this post). Just upload it to your ESP after setting Wifi up and saving that. I'd recommend visiting the page from a smartphone, the touch controls feel fluid. The webpage is a (espIP):8000

var page = '<body style="width:100%;height:100%;overflow:hidden;"><svg style="width:100%;height:100%;"  viewbox="0 0 500 500" id="svg"><path style="fill:#80e5ff;fill-opacity:1;fill-rule:nonzero;stroke:none" d="M 250 0 C 111.92882 3.7895613e-14 0 111.92882 0 250 C -1.249508e-14 341.05067 48.689713 420.72528 121.4375 464.4375 L 154.625 409.40625 C 100.50052 376.95218 64.28125 317.69934 64.28125 250 C 64.28125 147.43284 147.43284 64.28125 250 64.28125 C 352.56716 64.28125 435.71875 147.43284 435.71875 250 C 435.71875 317.53896 399.66155 376.65256 345.75 409.15625 L 378.71875 464.34375 C 451.37991 420.61135 500 340.98541 500 250 C 500 111.92882 388.07118 -1.8947806e-14 250 0 z " id="ring"/> <rect style="fill:#ffffff;fill-opacity:1;fill-rule:nonzero;stroke:none" id="needle" width="16" height="80" x="242"/> <text xml:space="preserve" style="font-size:122.59261322px;font-style:normal;font-variant:normal;font-weight:normal;font-stretch:normal;text-align:center;line-height:125%;letter-spacing:0px;word-spacing:0px;text-anchor:middle;fill:#000000;fill-opacity:1;stroke:none;font-family:Helvetica;-inkscape-font-specification:Helvetica" x="250.01915" y="845.31812" id="text"><tspan id="label" x="250.01915" y="292.95594">0</tspan></text> <path style="fill:#d5f6ff;fill-opacity:1;fill-rule:nonzero;stroke:none" id="up" d="m 294.75099,133.39225 -90.93056,0 45.46528,-78.748173 z" transform="matrix(0.61903879,0,0,0.61903879,95.682477,91.16682)" /> <path transform="matrix(0.61903879,0,0,-0.61903879,95.682477,408.80767)" d="m 294.75099,133.39225 -90.93056,0 45.46528,-78.748173 z" id="dn" style="fill:#d5f6ff;fill-opacity:1;fill-rule:nonzero;stroke:none" /></svg><script>var ws=new WebSocket("ws://"+location.host,"protocolOne"),timestamp=Date.now(),pos=50,dragging=!1;function $(a){return document.getElementById(a)}function setPos(a){0>a&&(a=0);100<a&&(a=100);pos=a;100<Date.now()-timestamp&&(timestamp=Date.now(),ws.send(pos));$("label").textContent=pos;a=2.8*(pos-50);$("needle").setAttribute("transform","rotate("+a+" 250 250)")}setPos(pos);function dragStart(){dragging=!0;$("ring").style.fill="#ff0000"}document.addEventListener("mousemove",function(a){if(dragging){a.preventDefault();var b=$("svg");setPos(Math.round(180*Math.atan2(a.clientX-b.clientWidth/2,b.clientHeight/2-a.clientY)/Math.PI/2.8+50))}});document.addEventListener("mouseup",function(a){dragging=!1;$("ring").style.fill="#80e5ff";$("up").style.fill="#d5f6ff";$("dn").style.fill="#d5f6ff"});function touchHandler(a){var b=a.changedTouches[0],c="";switch(a.type){case "touchstart":c="mousedown";break;case "touchmove":c="mousemove";break;case "touchend":c="mouseup";break;default:return}var d=document.createEvent("MouseEvent");d.initMouseEvent(c,!0,!0,window,1,b.screenX,b.screenY,b.clientX,b.clientY,!1,!1,!1,!1,0,null);b.target.dispatchEvent(d);a.preventDefault()}document.addEventListener("touchstart",touchHandler,!0);document.addEventListener("touchmove",touchHandler,!0);document.addEventListener("touchend",touchHandler,!0);document.addEventListener("touchcancel",touchHandler,!0);$("ring").onmousedown=dragStart;$("needle").onmousedown=dragStart;$("up").onmousedown=function(a){a.preventDefault();this.style.fill="#00ff00"};$("dn").onmousedown=function(a){a.preventDefault();this.style.fill="#ff0000"};$("up").onmouseup=function(a){setPos(pos+10)};$("dn").onmouseup=function(a){setPos(pos-10)};</script></body>';

function onPageRequest(req, res) {
  res.writeHead(200, {'Content-Type': 'text/html'});
  res.end(page);
}

var server = require('ws').createServer(onPageRequest);
server.listen(8000);
server.on("websocket", function(ws) {
    ws.on('message',function(msg) { print("[WS] "+JSON.strin

Immediately after uploading the code the memory looks like this

>process.memory();
={ "free": 785, "usage": 615, "total": 1400, "history": 532 }

Then when the first user connects

ERROR: Out of Memory!
Execution Interrupted
>process.memory();
={ "free": 588, "usage": 812, "total": 1400, "history": 1 }

I believe the history is cleared and the out of memory error isn't a problem

Best way to handle Serial data from a PC?

in Interfacing • 8 years, 1 month

I have a bunch of data that I want to be transferred from my PC to the Espruino then to a display. Would it be better to have a script on the Espruino parse the JSON Data and write it to the display, or would it be better for the PC to send direct graphics drawString's then flip it at the end?

I was thinking the latter as it would mean the Espruino doesn't need to be written then saved, the PC can just write the init code for the display when it connects.
SSD1306 OLED - sample code isn't working

in Interfacing • 8 years, 1 month
DrAzzy means when you set your interval you assign it to a global variable. For example

var state, interval; function toggleLed(){ digitalWrite(LED1,state=!state); } setWatch(function() {interval=setInterval(toggleLed,500);},BTN, {repeat: true, edge: 'rising', debounce:5});

You would call clearInterval(interval) to stop only this interval.
grb ws2812b?

in Interfacing • 8 years, 2 months

Thanks @Gordon I didn't know about that should make it easier for my brain, I'm just used to everything always being RGB.
grb ws2812b?

in Interfacing • 8 years, 2 months

Huh, here on the wiki it comments that as green but when I try it its red, but perhaps that is because the wiki is written on the older WS2811's?

EDIT: Nevermind you're completely correct, checked the datasheet and it does say follow the order of GRB. Guess I'm just gonna have to get used to it.
grb ws2812b?

in Interfacing • 8 years, 2 months

I've recently started playing with a WS2812B ring and I expected the color format to be RGB, however when I send a [255,0,0] the first LED lights up green instead of red. This baffled me so I tried [0,255,0] and the first LED turned red and [0,0,255] blue. Are some variants of the WS2812b's GRB instead of RGB or am I doing something wrong? This also happens when using the graphics library the color scheme is GRB.
Graphics

in ESP8266 • 8 years, 2 months

I'm assuming that the Graphics library isn't included in the build for ESP8266 both from this post by @MaBe and my own testing with an ESP-12 and it returning "Uncaught ReferenceError: "Graphics" is not defined". Perhaps this should be documented on the Espruino on ESP8266 docs page.

If anyone does get a build working with graphics I'd love to know. I'm trying to fit a power supply, ESP8266 and SSD1306 (or some other display) into a light switch in a wall for monitoring server temps and usage, I'm not sure if I can fit one of my original Espruinos in there too.
New Web IDE

in News • 8 years, 2 months

Just letting you know that the link from the forum doesn't copy the code to the IDE, you have to refresh the page. Is this to do with the link shortening to microcosm.app?
Espruino on your watch!

in Projects • 8 years, 3 months

Is there any differences we can tell from the listings apart from that one saying it has the NRF chip which I guess is a big enough clue.

Even thought my current model isn't the Nordic chip I realized, had it been I wouldn't of known how to flash it anyway. How is it you're doing that?
New Espruino Board

in Electronics • 8 years, 3 months

Nothing to add just want to say I'd be interested in the bare-bones Espruino's. Always finding myself making something cool I'd like to keep but that isn't worth wasting my (expensive when compaired to the trinket I'm making) Espruino on. Been thinking about printing my own bare-bones STM PCB's for the job but I just seem to never get round to it.
Espruino on your watch!

in Projects • 8 years, 3 months

It appears Gordon got lucky, like @ColinP I also got the LCD CC2451 variant. To add insult to injury I can't even pair it with my phone. Espruino as a wearable perhaps too good to be true xD
Espruino on your watch!

in Projects • 8 years, 3 months

Does this have any feedback other than the display? E.g. a buzzer, LED or vibration?

Edit: Read it has vibration, awesome.
Espruino on your watch!

in Projects • 8 years, 3 months

Very interested in this!
Pax-Instruments PI13264 132*64 LCD?

in Interfacing • 8 years, 3 months

Ooh, bingo should of tried that I did read it on the ST7565 page. Yeah just the last 4 width pixels are randomly lit. Excellent work on this module I couldn't wrap my head around that SPI init stuff.

Also g.setContrast(0.5, 6) is the sweet spot for this display.
Pax-Instruments PI13264 132*64 LCD?

in Interfacing • 8 years, 4 months
Hmm, I can't get it to work at all, This display has a pin labeled A0, I'm assuming this is RS/DC for setting if it is Data or a Command.

As I don't have the middle pins soldered on I've changed the pins to
GND -> GND
VCC -> 3.3v
LCD_BL -> 3.3v
LCD_CS -> C5
LCD_RST -> C6
LCD_A0 -> C7
SCK - > B13
MOSI -> B15

With this code:

var spi = new SPI(); spi.setup({ sck: B13, mosi: B15 }); var g = require("ST7565").connect(spi, C7 /* RS / DC */, C5 /* CS / CE */, C6 /* RST */, function() { g.clear(); g.drawString("Hello",0,0); g.drawLine(0,10,84,10); g.flip(); });

That should work fine right?
Pax-Instruments PI13264 132*64 LCD?

in Interfacing • 8 years, 4 months

Would it be possible to add an optional parameter to the initialization to specify the resolution, then the PI13264 could be supported without a separate module?

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Search results for:

String Height

Nokia or oled on nodemcu - hardware connections

Nokia or oled on nodemcu - hardware connections

String Height

Best Way To Detect Missing JSON?

New Espruino Board

New Espruino Board

Question about Espruino Pico Deep Sleep Mode / Workaround to Read reliable sensor output with a Transistor

WebSocket Interactive UI

WebSocket Interactive UI

Best way to handle Serial data from a PC?

SSD1306 OLED - sample code isn't working

grb ws2812b?

grb ws2812b?

grb ws2812b?

Graphics

New Web IDE

Espruino on your watch!

New Espruino Board

Espruino on your watch!

Espruino on your watch!

Espruino on your watch!

Pax-Instruments PI13264 132*64 LCD?

Pax-Instruments PI13264 132*64 LCD?

Pax-Instruments PI13264 132*64 LCD?

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