ExperimentalZeros

Most recent activity

• Could I2C.readFrom() be made to return a Uint8?

  in JavaScript • 8 years, 5 months

  

  @MaBe
  Excellent! Great approach!

  @Gordon
  Thank you for the explanation, it does make sense.

• Latest Espruino build for Esp8266

  in ESP8266 • 8 years, 5 months

  

  You are correct! Voltage Divider on-board! Thanks

• Latest Espruino build for Esp8266

  in ESP8266 • 8 years, 5 months

  

  Now I understand - I used to send it this way and it complained:

  >analogRead(A0)
  Uncaught ReferenceError: "A0" is not defined
   at line 1 col 12
  analogRead(A0)
             ^
  

  .... All I had to do was send it like this analogRead(); to get it work!

  NOTE: On the WeMos website they mention that max on the analog read is 3.2v... we sill see.

  Thank you all!

• Could I2C.readFrom() be made to return a Uint8?

  in JavaScript • 8 years, 5 months

  

  Some background Info:

  I am using Espruino as an "external interface" to LabVIEW so I can control hardware away from my setup. I send and capture messages over TCP/IP and utilize its elements to either display and/or do something else.

  Over the computer I can discard anything from return string dump, utilize the information I need, and move on with the tasks. Nevertheless, I was really wondering how useful is the displaying of such type information is.

  And, if I am missing the whole point, please forgive me, I would love to take advantage of it.

  Still, regardless of how many messages are read or written: Aren't all I2C messages 1 Byte (Uint8) long by standard?

  Thank you all.

• Could I2C.readFrom() be made to return a Uint8?

  in JavaScript • 8 years, 5 months

  

  Hopefully this is the proper place the following question:

  with the following code:

  I2C1.setup({sda:D4,scl:D5});
  
  //var result;
  
  function m(){
  var PAYLOAD = [];
  var data = [];
    for (var i = 0; i < 2; i++){
      I2C1.writeTo(0x40,(i));
      data = I2C1.readFrom(0x40,0x02);
      PAYLOAD.push(data);
  	}
    
  //result = PAYLOAD;
    return PAYLOAD;
    
  }
  

  I get the following output:

   _____                 _
  |   __|___ ___ ___ _ _|_|___ ___
  |   __|_ -| . |  _| | | |   | . |
  |_____|___|  _|_| |___|_|_|_|___|
            |_| http://espruino.com
   1v86.tve_master_247bc37 Copyright 2016 G.Williams
  Espruino is Open Source. Our work is supported
  only by sales of official boards and donations:
  http://espruino.com/Donate
  Flash map 4MB:512/512, manuf 0xe0 chip 0x4016
  >echo(0);
  =undefined
  >
  =undefined
  >m();
  =[
    new Uint8Array([113, 39]),
    new Uint8Array(2)
   ]
  > 
  

  My question(s):

  1.- What is the purpose of displaying new Uint8Array([113, 39]), instead of [113, 39]?

• please name the i2c devices you have tested or using

  in ESP8266 • 8 years, 5 months

  

  TI INA3221: "INA3221 Triple-Channel, High-Side Measurement, Shunt and Bus Voltage Monitor"
  a.- (Dev Kit by SwitchDoc Labs : http://store.switchdoc.com/ina3221-breakout-board-3-channel-current-voltage-monitor-grove-headers-compare-to-ina219-grove-headers/ )

  b.- I2C works with: I2C1.setup({sda:D4,scl:D5});

  c.- Physical Pinouts are SCL/D1 and SDA/D2 (3 places on the board)

  d.- PullUps @ 4k1 Ohms

  E.- Work In Progress

• Latest Espruino build for Esp8266

  in ESP8266 • 8 years, 5 months

  

  @DrAzzy @tve I am very sorry, I meant to say analogRead()... but thanks for all the information!!! It has opened new resources I was not aware of!

• Solved I2C bitrate crash and clockstreching.

  in ESP8266 • 8 years, 5 months

  

  @MaBe

  Thank you, very relevant I2C information. Also, I will update the I2C Implementation table.

• Solved I2C bitrate crash and clockstreching.

  in ESP8266 • 8 years, 5 months

  

  @Frida and @MaBe,

  Thank you both for such quick response! I will sure wait for the update!

• Latest Espruino build for Esp8266

  in ESP8266 • 8 years, 5 months

  

  @Frida, or anyone

  That did it! I don't have a Logic Analyzer, but from your knowledge:

  1.-What do you think the data rate will be? Is fixed to a specific value or it fluctuates? those questions matter as I would like to size the pull-up resistors accordingly.

  2.- Do you by any chance know about AnalogWrite pin value or how to find it? I tried it to just put values starting at "A0" and kept on going (who knows how many iterations) without any luck.

  Thank you!