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Using @fanoush 's code imbedded in your app, the convenience singleton object for handling all RSSI stuff could look like the code below. Working thru the example you will notice that Espruino / JavaScript is completely event driven... and you can take advantage of that even in application components you write. No need to burn cycles like famous (NOP) wait loops do... ;)
NB: Things - such as
NRF.setRSSIHandler()setting method - not available in your environment - emulator or html doc in browser? ...just fake/emulate it 'intelligently' - see lines59..71to get meaningful values for (cross) developing and test your logic... Same goes for the missingon()andemit()for plain browser js objects - see lines72..77. With these 'complements', the very same Espruino code runs in html5 document in browser. The html document is attached to the post, just click on its link... ;) --- *click on the second attached html / link* - first one has issues and I could not delete it because forum has issues on edit with loading... / deleting of attachments). HTML code is shown below the Espruino code.// for logging convenience var lon=0, log=function(){console.log.apply(console,arguments);}; // rssis singleton object handling all RSSI matters encapsulated var rssis = { history: [] // [date,value] tuples of samples , maxHist: 10 // max count averaged samples in history , intTime: 5000 // ms interval time of sampling , samples: 5 // count of raw samples for for averaged sample , _intId: 0 // interval id for start/stop control , _cnt: 0 // for sampling control , _sample: function() { // --- takes samples and stores in history var sum = 0 , cnt = this.samples , avrg, hEntry; NRF.setRSSIHandler((data)=>{ lon&&log("C:",data,this._cnt); sum+=data; if (--cnt<1) { NRF.setRSSIHandler(); hEntry = [new Date(), avrg = sum/this.samples]; this.history.splice(0, 0, hEntry); if (this.history.length>this.maxHist) this.history.pop(); this.emit('data', avrg, hEntry, data, this); } } ); } , start: function(clearHistory,_rs) { // --- opt clear history and take samples lon&&log("rssis.start",((_rs)?_rs:""), "clearHistory:", !!clearHistory); if (this._intId) { this.stop(); } if (clearHistory) { this.history = []; } this._intId = setInterval(this._sample.bind(this), this.intTime); return this.history.length; } , isSampling: function() { // --- true when sampling, otherwise false return !!this._intId; } , getHistoryCnt: function() { // --- number of history entries return this.history.length; } , stop: function() { // --- stop taking samples lon&&log("rssis.stop"); if (this._intId) { NRF.setRSSIHandler(); // stops data handler in its tracks this._intId = clearInterval(this._intId); // stops sampling } return this.history.length; } , resume: function() { // --- resume w/ not clearing history return this.start(0,"(resume)"); } , dump: function(asHTML) { // --- return history as lines / html w/ <br> var x=-1,l=this.history.length,h,lines=[]; while(++x<l){h=this.history[x];lines.push(h[0].toString()+": "+h[1]);} lines.push(l); return (asHTML) ? lines.join("<br>")+"<br>" : lines; } }; // to run in emulator or html5 doc in browser have this in place (roughly): var nrfDataEmulatorIntId=0; if (typeof NRF === 'undefined') { var NRF = {}; } NRF.setRSSIHandler = function(dataHandler) { // every 7 ms an emulated value if (dataHandler && ! nrfDataEmulatorIntId) { lon&&log("P:start"); nrfDataEmulatorIntId = setInterval((dataHandler)=>{ var emulatedVal = Math.round((new Date().getTime() % 100) / 10) - 90; lon&&log("P:", emulatedVal); dataHandler(emulatedVal); },13,dataHandler); } else if (! dataHandler && nrfDataEmulatorIntId) { lon&&log("P:stop"); nrfDataEmulatorIntId = clearInterval(nrfDataEmulatorIntId); } }; if (typeof window !== 'undefined'){ lon&&log("in browser js/win"); // for html5 doc let addOnAndEmitTo=function(o,n){ lon&&log("add simple on/emit to "+n);o._eOE={}; o.on=function(e,h){this._eOE[e]=h;};o.emit=function(){var p=[],i,a=arguments,m, u; if(m=this._eOE[a[0]]){for(i=1;i<a.length;i++)p.push(a[i]); m.apply(u,p);}}}; if ( ! rssis.on) { addOnAndEmitTo(rssis,"rssis"); } } // catching rssis 'data'-event rssis.on("data",(avrg, historyItem, rawSample, rssisObj)=>{ lon&&log("rssis 'data' event: ", avrg, historyItem, rawSample, rssisObj.getHistoryCnt()); }); // for dev acceleration function onInit() { rssis.start(); } // for dev acceleration setTimeout(onInit,999); // remove before upload for/with save()HTML document running the same Espruino code:
<html> <head><title>RSSIs</title></head><body> <h3>RSSIs</h3> <p>Open inspector in develop tools and watch console...</p> <ul> <li><a href="#" onclick="rssis.start();" >start</a></li> <li><a href="#" onclick="rssis.start(1);">start with clearing history</a></li> <li><a href="#" onclick="rssis.stop();" >stop</a></li> <li><a href="#" onclick="rssis.resume();">resume</a></li> <li><a href="#" onclick="ao.h('dmp',rssis.dump(1)+ao.e('dmp').innerHTML);";>dump</li> </ul> <hr><a href="#" onclick="ao.h('dmp','');">clear</a><pre id="dmp"></pre> <!--survival html5 --><script> var ao = { d: document , e: function(ioe) { return ("string"===typeof ioe) ? this.d.getElementById(ioe) : ioe; } , h: function(ioe,h) { var e = this.e(ioe); return e.innerHTML = h; return e; } }</script> <!-- rssis js from Espruino --> <script> // ... ... ... ... Espruino js code from above copied in here... ... ... ... </script> </body> </html>The
rssissingleton supports these 'methods' and other:- For start taking samples and store them in history, issue
rssis.start(); - To stop taking samples, issue:
rssis.start(); - To dump the history in the console (anytime), issue
rssi.dump(); To access last data (any time, from the history):
var h; if (rssis.historyCount>0) { h = rssis.history[0]; console.log("RSSSI at", h[0], ": ", h[1]) }
...or simply:
console.log(rssis.history[0][1]);The objet even emits
'data'event when adding to the history with these parms (see line #s24and60ff`):- most recent averaged sample: avrg
- history entry: [date, avrg]
- most recent raw sample: data
- rssis singleton object
This event can be listen to in the application in a similar way as
rssisis listening to theNRF 'data'event:// catching rssis 'data'-event rssis.on("data",(avrg, historyItem, rawSample, rssisObj)=>{ console.log("rssis 'data' event: ', avrg, historyItem, rawSample, rssisObj.getHistoryCnt()); });With `lon=0' (logging turned off) you get only outputs like this in the console (most recent average rssi value, most recent history event with date and rssi average, most recent raw rssi sample value, and history count):
rssis 'data' event: -85 [ Date: Tue Oct 4 2022 18:34:31 GMT-0700, -85 ] -86 1Setting
lon=1(turns logging on and) you get after uploading and console commands (latter indented) output on console like this:> ____ _ | __|___ ___ ___ _ _|_|___ ___ | __|_ -| . | _| | | | | . | |____|___| _|_| |___|_|_|_|___| |_| espruino.com 2v15 (c) 2021 G.Williams > > rssis.start clearHistory: false P:start P: -80 C: -80 0 P: -89 C: -89 0 P: -88 C: -88 0 P: -87 C: -87 0 P: -85 C: -85 0 P:stop rssis 'data' event: -85.8 [ Date: Tue Oct 4 2022 22:30:09 GMT-0700, -85.8 ] -85 1 ----------------------->rssis.dump() // while sampling =[ "Tue Oct 4 2022 22:30:09 GMT-0700: -85.8", 1 ] P:start P: -80 C: -80 0 P: -89 C: -89 0 P: -88 C: -88 0 P: -86 C: -86 0 P: -85 C: -85 0 P:stop rssis 'data' event: -85.6 [ Date: Tue Oct 4 2022 22:30:14 GMT-0700, -85.6 ] -85 2 P:start P: -81 C: -81 0 P: -89 C: -89 0 P: -88 C: -88 0 P: -87 C: -87 0 P: -85 C: -85 0 P:stop rssis 'data' event: -86 [ Date: Tue Oct 4 2022 22:30:19 GMT-0700, -86 ] -85 3 ----------------------->rssis.stop(); // while sampling rssis.stop =3 ----------------------->rssis.dump(); // while not sampling =[ "Tue Oct 4 2022 22:30:19 GMT-0700: -86", "Tue Oct 4 2022 22:30:14 GMT-0700: -85.6", "Tue Oct 4 2022 22:30:09 GMT-0700: -85.8", 3 ] ----------------------->rssis.resume(); // while stopped rssis.start (resume) clearHistory: false =3 P:start P: -89 C: -89 0 P: -88 C: -88 0 P: -86 C: -86 0 P: -85 C: -85 0 P: -84 C: -84 0 P:stop rssis 'data' event: -86.4 [ Date: Tue Oct 4 2022 22:31:17 GMT-0700, -86.4 ] -84 4 ----------------------->rssis.start(1); // while sampling rssis.start clearHistory: true rssis.stop =0 P:start P: -85 C: -85 0 P: -84 C: -84 0 P: -83 C: -83 0 P: -82 C: -82 0 P: -80 C: -80 0 P:stop rssis 'data' event: -82.8 [ Date: Tue Oct 4 2022 22:31:27 GMT-0700, -82.8 ] -80 1 P:start P: -86 C: -86 0 P: -85 C: -85 0 P: -84 C: -84 0 P: -82 C: -82 0 P: -80 C: -80 0 P:stop rssis 'data' event: -83.4 [ Date: Tue Oct 4 2022 22:31:32 GMT-0700, -83.4 ] -80 2 ----------------------->rssis.stop(); // while sampling rssis.stop =2 ----------------------->rssis.dump(); while stopped =[ "Tue Oct 4 2022 22:31:32 GMT-0700: -83.4", "Tue Oct 4 2022 22:31:27 GMT-0700: -82.8", 2 ] > - For start taking samples and store them in history, issue
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Ic. Thanks for clarification. I think I get it: it is 'just' a SW replacement... nice! Like the Bangle.js watches: taking an existing hardware and software and replace the software. Very interesting. The word 'just' just does not do justice to the work you put in, even peeking at the Arduino implementation / its doc.
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Was thinking more along the lines of adding a ref pointer to variables. Of course this is not footprint friendly, but preserves source.
Your replacement approach triggered another thought: in dbs, often a local index is built to save space. In code it would be a symbol index to keep the name / preserve the source but having a space to replace it on first run w/ a pointer into variable value space, that holds the value but would also hold also a pointer back to the index entry / name.
I'm sure you already have though of many things, wandered down alleys... and kept sticking to what Espruino interpreter has come to this day. So no urgency to this.
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Speeding up variable lookup (and jump address lookup/'calculations') promise the most. Was there ever a thought to have something (changed) in the source that updates when the variable has been looked up? Of course that works only when the code is in RAM and a in/re-direction table that makes GC transparent? So it is not really a JIT compiler but more so an accelerator that does a lot of good especially in loops - similar to what pre-tokenzing does. An accelerator is not JIT compiler nor main stream, but Espruino isn't either. Such an accelerator would be unique and - after all - fit the uniqueness of Espruino (JS engine).
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#jeffmer, Bull's Eye! - That's all I can say...
So: you got yourself such a device, ripped out the Arduino stuff and put in an Espruino w/ your code?
I'm kind of curious to know whether there is still enough space left to have a Morse Code interpreter / decypher DX transmissions on SSB?
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...here it is... it is in someone elses conversation New to Bangle.js and Espruino. Need help with graphics... Nov 2020
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Hit that limit a while ago... if your algorithm can handle a detection and cut-up in multiple 'touching' polys / segments, it is easy to live with the limitation.
I had build a circular multi dial... and on a certain size with close to 360 degrees and expectation of decent smoothness of the 'bent bar'/bow, you run quickly into the limit. Luckily for me, I calculate max 30 points of a segment, note the angel and finish calculating the rest of the segment, draw it, and move on to the next segment until the desired angle is covered. Somewhere in the (difficult to search) forum you can find the code...
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Obviously missed this discussion / voting / weighing in...
Not sure my comment changes much from point of view of liking or not liking github for discussion. These are the cons for the current forum:
- not mainstream
- created for discussing non-code things
- no integration with a real repository
- difficult, limited search
- limited image integration
- formatting has changed over time making a lot of my older, markup using entries unreadable
I don't want to leave it at cons - and that may be reason for many to be content with the current forum:
- easy to use for simple posts
- file / image integration usually sufficient
- not mainstream
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@Jennygrist, what is the motivation to use a pico vs a puck? Pico has no communication. You would have to add that as a separate device. Just to mention one con.
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@Gordon, what about the input controls on active overlay, especially the touch?
Espruino makes IoT as easy as 123!