Cannot find module 'i2c-bus' even we have npm install i2c-bus

[vkjuju]

We hit a weird error(Error: Cannot find module 'i2c-bus') even we have done npm install i2c-bus, we have also checked:

$npm list|grep i2c-bus
├─┬ [email protected]
│ ├─┬ [email protected]
│ ├── [email protected] deduped

the error is as follows, please kindly be advised:

Error: Cannot find module 'i2c-bus'
at Function.Module._resolveFilename (internal/modules/cjs/loader.js:581:15)
at Function.Module._load (internal/modules/cjs/loader.js:507:25)
at Module.require (internal/modules/cjs/loader.js:637:17)
at require (internal/modules/cjs/helpers.js:20:18)
at Object. (/home/pi/Dexter/GrovePi/Software/NodeJS/libs/grovepi.js:2:19)
at Module._compile (internal/modules/cjs/loader.js:689:30)
at Object.Module._extensions..js (internal/modules/cjs/loader.js:700:10)
at Module.load (internal/modules/cjs/loader.js:599:32)
at tryModuleLoad (internal/modules/cjs/loader.js:538:12)
at Function.Module._load (internal/modules/cjs/loader.js:530:3)
at Module.require (internal/modules/cjs/loader.js:637:17)
at require (internal/modules/cjs/helpers.js:20:18)
at Object. (/home/pi/Dexter/GrovePi/Software/NodeJS/libs/sensors/base/sensor.js:3:20)
at Module._compile (internal/modules/cjs/loader.js:689:30)
at Object.Module._extensions..js (internal/modules/cjs/loader.js:700:10)
at Module.load (internal/modules/cjs/loader.js:599:32)

[RobertLucian]

I've just tried the NodeJS library and I haven't had any issues with it. The installation of node-grovepi went fine and that was it. And I already have done it a couple of times so it works.

And it doesn't make any sense for npm to not be able to install i2c-bus since that's already up on npm. Maybe you can uninstall these I2C packages, or better yet all of them and start from scratch again by running the install command.

Just so you know, I've been doing this on my Stretch Raspbian For Robots image dated this summer (the latest one). These following details might also help you: the npm version is 5.6.0, node version is 9.11.2 and this is the package tree I get when I type npm list:

The version of node-grovepi shouldn't have to do anything with your issue. On the NPM repo there's the 2.2.2 version and on this repo it's the 2.2.0.

[vkjuju]

please take a look at the following npmlist i2c-bus, does that mean my ic2-bus installed successfully ?

Thanks
Joe

npm list i2c-bus
[email protected] /home/pi/workspace/rapiro-iotf
├── [email protected]
├─┬ [email protected]
│ └── [email protected]
└─┬ [email protected]
└── [email protected] deduped

[RobertLucian]

So it looks yeah. Was the re-installation that did the job for you? Are you now able to import the module in the console?

[vkjuju]

no luck after reinstall , I don't know how to debug this issue, any more advice ? other modules running perfectly on my pi3 except this one, I have been hanging there for over one week :( any chance for teamviewer ? Thanks

[vkjuju]

my node.js code is as follows, looks like serialport calling j2c-bus module, any advice would be appreciated .

const SerialPort = require('serialport');
const Readline = SerialPort.parsers.Readline;
const port = new SerialPort("/dev/ttys0",{
baudRate: 57600,
parser: new Readline("\n")
});

[vkjuju]

working around it as follows:
cd /home/pi/Dexter/GrovePi/Software/NodeJS/libs/sensors/base
npm install i2c-bus

[vkjuju]

but we hit another error:

pi@raspberrypi:~/workspace/rapiro-iotf $ sudo node robot_main.js
starting
info GrovePi.board GrovePi is initing
/home/pi/workspace/rapiro-iotf/robot_main.js:165
soundSensor = new SoundAnalogSensor(2)
^

TypeError: SoundAnalogSensor is not a constructor
at onInit (/home/pi/workspace/rapiro-iotf/robot_main.js:165:16)
at GrovePi.init (/home/pi/workspace/rapiro-iotf/node_modules/node-grovepi/grovepi.js:73:9)
at start (/home/pi/workspace/rapiro-iotf/robot_main.js:268:9)
at Object. (/home/pi/workspace/rapiro-iotf/robot_main.js:315:1)
at Module._compile (internal/modules/cjs/loader.js:654:30)
at Object.Module._extensions..js (internal/modules/cjs/loader.js:665:10)
at Module.load (internal/modules/cjs/loader.js:566:32)
at tryModuleLoad (internal/modules/cjs/loader.js:506:12)
at Function.Module._load (internal/modules/cjs/loader.js:498:3)
at Function.Module.runMain (internal/modules/cjs/loader.js:695:10)
at startup (internal/bootstrap/node.js:201:19)
at bootstrapNodeJSCore (internal/bootstrap/node.js:516:3)

[vkjuju]

node.js code:
function start() {
console.log('starting')

board = new Board({
debug: true,
onError: function(err) {
console.log('TEST ERROR')
console.log(err)
},
onInit: function(res) {
if (res) {
ultrasonicSensor = new UltrasonicDigitalSensor(2)
lightSensor = new LightAnalogSensor(1)
soundSensor = new SoundAnalogSensor(2)
var buttonSensor = new ButtonDigitalSensor(5)

             buttonSensor.stream(100,function(res){
             if(res==1){
             processing_music.stop();
            trigger=false;
            can_record=true;
            speaker_using=false;
             sp.write("#M00\n");

             }
             }
            );

[vkjuju]

I have opened a new issue: https://forum.dexterindustries.com/t/typeerror-soundanalogsensor-is-not-a-constructor/5074