ADS1115 not working

[KSels]

I tryed connecting an ADS1115 at i2c 1 and 0x48.

var mraa = require('mraa');

var version = mraa.getVersion();

if (version >= 'v0.6.1') {

console.log('mraa version (' + version + ') ok');

}

else {

console.log('mraa version(' + version + ') is old - this code may not work');

}

var ADS1X15 = require('jsupm_ads1x15');

var ads1115 = new ADS1X15.ADS1115(1, 0x48);

//var ads1015 = new ADS1X15.ADS1015(1, 0x48);

setInterval(function(){

console.log(ads1115.getSample());

//console.log(ads1015.getSample());

console.log("*********************");

}, 1000);

but only get an error:

mraa version (v0.9.0) ok

ERROR: module.js:340

ERROR: throw err;

^

ERROR: Error: Cannot find module 'jsupm_ads1x15'

at Function.Module._resolveFilename (module.js:338:15)

at Function.Module._load (module.js:280:25)

at Module.require (module.js:364:17)

at require (module.js:380:17)

at Object. (/home/root/.node_app_slot/main.js:11:15)

at Module._compile (module.js:456:26)

at Object.Module._extensions..js (module.js:474:10)

at Module.load (module.js:356:32)

at Function.Module._load (module.js:312:12)

at Function.Module.runMain (module.js:497:10)

[Carlos_M_Intel · Accepted solution]

Hi KimLorentz

On Edison image version 159.devkit you will need to update UPM and MRAA libraries by editing the /etc/opkg/iotkit.conf file. You can run the following command.

root@edison:~# echo "src iotkit http://iotdk.intel.com/repos/3.0/intelgalactic/opkg/i586 http://iotdk.intel.com/repos/3.0/intelgalactic/opkg/i586" > /etc/opkg/iotkit.conf

The run the following commands

root@edison:~# opkg update

root@edison:~# opkg install mraa

root@edison:~# opkg install upm

After this, download the code from: https://github.com/intel-iot-devkit/upm/blob/master/examples/javascript/ads1x15.js upm/ads1x15.js at master · intel-iot-devkit/upm · GitHub and run it with node ads1x15.js

Regards,

Charlie

[KSels]

Dont get any errors anymore, tnx.

Console,log settings

console.log(ads1115.getSample());

console.log(ads1115.getGain());

console.log(ads1115.getSPS());

console.log(ads1115.getCompMode());

console.log(ads1115.getCompPol());

console.log(ads1115.getCompLatch());

console.log(ads1115.getCompQue());

console.log(ads1115.getContinuous());

console.log(ads1115.getThresh());

console.log("*********************");

Console.log respons

0

1024

128

false

false

true

3

false

-2.0479376316070557

*********************

How do I write to the ADS1115?

[Carlos_M_Intel]

Hi KimLorentz,

Take a look in: https://github.com/intel-iot-devkit/upm/blob/master/src/ads1x15/ads1x15.h upm/ads1x15.h at master · intel-iot-devkit/upm · GitHub you will see the available functions that the library has. Check for the set* functions like setGain and setSPS I think this will help you.

Regards,

Charlie

[KSels]

Tryed using the set function but dont know how to do that.

Do you know?

var mraa = require('mraa');

var version = mraa.getVersion();

if (version >= 'v0.6.1') {

console.log('mraa version (' + version + ') ok');

}

else {

console.log('mraa version(' + version + ') is old - this code may not work');

}

// Instantiate on I2C bus

var ADS1X15 = require('jsupm_ads1x15');

var ads1115 = new ADS1X15.ADS1115(1, 0x48);

ads1115.setGain(); // Set to 2.048 (GAIN_TWO)

ads1115.setSPS(); // Set to 128 SPS

setInterval(function(){

console.log("*********************");

console.log("Sample: " + ads1115.getSample()); // Read DIFF 0-1

console.log("Gain: " + ads1115.getGain());

console.log("SPS: " + ads1115.getSPS());

console.log("*********************");

}, 100);

[Carlos_M_Intel]

Hi KimLorentz

I don't have your shield to test this so I'm getting error messages after trying to run different codes because the UPM library verifies if the shield is indeed connected to the board.

On your code, you are using ads1115, the ads1115.h offers the SPS constants you can use:

SPS_8 = ADS1115_DR_8SPS,

SPS_16 = ADS1115_DR_16SPS,

SPS_32 = ADS1115_DR_32SPS,

SPS_64 = ADS1115_DR_64SPS,

SPS_128 = ADS1115_DR_128SPS,

SPS_250 = ADS1115_DR_250SPS,

SPS_475 = ADS1115_DR_475SPS,

SPS_860 = ADS1115_DR_860SPS

In your case you have to use SPS_128, or you can try with the HEX value: 0x0080

In the ads1x15.h you will find the constants for the gains.

GAIN_TWOTHIRDS = ADS1X15_PGA_6_144V,

GAIN_ONE = ADS1X15_PGA_4_096V,

GAIN_TWO = ADS1X15_PGA_2_048V,

GAIN_FOUR = ADS1X15_PGA_1_024V,

GAIN_EIGHT = ADS1X15_PGA_0_512V,

GAIN_SIXTEEN = ADS1X15_PGA_0_256V

Try with GAIN_TWO or with the HEX value: 0x0400

Let me know your results.

Regards,

Charlie

[KSels]

Thayed that, only get funny responds.

how do I manualy write data to the i2c device without the library to se how that goes

[Carlos_M_Intel]

Hi KimLorentz,

I apologize for the delay in my response, I would like to know if you have been able to work on this and if you have some new results.

Regarding your question:

Check the following commands in order to interact from the Linux prompt:

http://linux.die.net/man/8/i2cdetect i2cdetect(8): detect I2C chips - Linux man page

http://linux.die.net/man/8/i2cdump i2cdump(8): examine I2C registers - Linux man page

http://linux.die.net/man/8/i2cset i2cset(8): set I2C registers - Linux man page

http://linux.die.net/man/8/i2cget i2cget(8): read from I2C/SMBus chip registers - Linux man page

Regards,

Charlie

[CCurt3]

Hi, I am trying to run the code in the original post. I have installed both mraa v1.0.0 and upm v0.7.0. When I run the code I get the error:

mraa version (v1.0.0) ok

/home/root/node/adc.js:12

var ads1115 = new ADS1X15.ADS1115(1, 0x48);

^

Error: Illegal arguments for construction of _exports_ADS1115

at Error (native)

at Object. (/home/root/node/adc.js:12:15)

at Module._compile (module.js:409:26)

at Object.Module._extensions..js (module.js:416:10)

at Module.load (module.js:343:32)

at Function.Module._load (module.js:300:12)

at Function.Module.runMain (module.js:441:10)

at startup (node.js:139:18)

at node.js:968:3

Any ideas as to what is causing this issue? Could it be a versioning issue with upm?

Thanks, Curtis

Edit: It was a problem with my pull up resistors, it works now.