Does not compile under nodejs 12.x.

[unixbigot]

Generates lots of warnings under node v10 (but works). Fails to build at all on node v12.

(Tested on raspbian buster, and node 12.13.0)

[jatg81]

I have installed it successfully under node v12 on raspbian buster. If you try to install it directly from npm (npm install node-red-contrib-i2c), it generates a lots of warnings because npm package v 0.5.2 tries to be installed. This version has a bug (missing ")") which was solved in version 0.5.5.

Try to install directly from github with this command, until npm package be updated to the last version. @nielsnl68 npm install https://github.com/nielsnl68/node-red-contrib-i2c.git

Generates lots of warnings under node v10 (but works). Fails to build at all on node v12.

(Tested on raspbian buster, and node 12.13.0)

[VogelP]

thanks jatg81, your solution also works with buster + node.js 13.3.0 + node-red 1.0.3

[den-dog]

For what it is worth, ran into same issue with using version 0.5.2 from the node-red palette manager. used the git version directly and it works now on: node -v v12.14.0 npm -v 6.13.4 and this on buster with a raspberry 3 B+ I hope they push new version shortly to npm central repository

[rei-vilo]

@jatg81 Thank you for the solution! All works fine on

• uname -a: Linux myPiMozilla 4.19.93-v7+ #1290 SMP Fri Jan 10 16:39:50 GMT 2020 armv7l GNU/Linux
• node -v: v12.14.1
• npm -v: 6.13.7

[Marooned-MB]

I hope digging this old thread is ok. I decided to refresh my RPi B rev 2 (ARMv6). I've installed latest RPi OS and wanted to go with docker and IOTstack, but it failed in so many ways I gave up. Now I'm trying to install Node-RED and all my nodes to run my flows again and have few issues, i2c is one of them.

I've tried npm install (whole package for node-red), npm install i2c and also mentioned above npm install https://github.com/nielsnl68/node-red-contrib-i2c.git, the result is always the same: dozens of screens with errors (small excerpt below)

...
/home/pi/.cache/node-gyp/12.19.0/include/node/v8.h:2709:40: note:   candidate expects 1 argument, 0 provided
In file included from ../src/i2c.cc:107:
../src/./writequick.cc: In function ‘Nan::NAN_METHOD_RETURN_TYPE WriteQuickSync(Nan::NAN_METHOD_ARGS_TYPE)’:
../src/./writequick.cc:60:32: error: no matching function for call to ‘v8::Value::Int32Value()’
   int fd = info[0]->Int32Value();
                                ^
In file included from /home/pi/.cache/node-gyp/12.19.0/include/node/node.h:67,
                 from ../src/i2c.cc:1:
/home/pi/.cache/node-gyp/12.19.0/include/node/v8.h:2709:40: note: candidate: ‘v8::Maybe<int> v8::Value::Int32Value(v8::Local<v8::Context>) const’
   V8_WARN_UNUSED_RESULT Maybe<int32_t> Int32Value(Local<Context> context) const;
                                        ^~~~~~~~~~
/home/pi/.cache/node-gyp/12.19.0/include/node/v8.h:2709:40: note:   candidate expects 1 argument, 0 provided
In file included from ../src/i2c.cc:107:
../src/./writequick.cc:61:34: error: no matching function for call to ‘v8::Value::Int32Value()’
   __u8 bit = info[1]->Int32Value();
                                  ^
In file included from /home/pi/.cache/node-gyp/12.19.0/include/node/node.h:67,
                 from ../src/i2c.cc:1:
/home/pi/.cache/node-gyp/12.19.0/include/node/v8.h:2709:40: note: candidate: ‘v8::Maybe<int> v8::Value::Int32Value(v8::Local<v8::Context>) const’
   V8_WARN_UNUSED_RESULT Maybe<int32_t> Int32Value(Local<Context> context) const;
                                        ^~~~~~~~~~
/home/pi/.cache/node-gyp/12.19.0/include/node/v8.h:2709:40: note:   candidate expects 1 argument, 0 provided
make: *** [i2c.target.mk:111: Release/obj.target/i2c/src/i2c.o] Error 1
make: Leaving directory '/home/pi/.node-red/node_modules/i2c-bus/build'
gyp ERR! build error
gyp ERR! stack Error: `make` failed with exit code: 2
gyp ERR! stack     at ChildProcess.onExit (/usr/lib/node_modules/npm/node_modules/node-gyp/lib/build.js:194:23)
gyp ERR! stack     at ChildProcess.emit (events.js:314:20)
gyp ERR! stack     at Process.ChildProcess._handle.onexit (internal/child_process.js:275:12)
gyp ERR! System Linux 5.4.72+
gyp ERR! command "/usr/bin/node" "/usr/lib/node_modules/npm/node_modules/node-gyp/bin/node-gyp.js" "rebuild"
gyp ERR! cwd /home/pi/.node-red/node_modules/i2c-bus
gyp ERR! node -v v12.19.0
gyp ERR! node-gyp -v v5.1.0
gyp ERR! not ok
npm WARN [email protected] No repository field.
npm WARN [email protected] No license field.

npm ERR! code ELIFECYCLE
npm ERR! errno 1
npm ERR! [email protected] install: `node-gyp rebuild`
npm ERR! Exit status 1
npm ERR!
npm ERR! Failed at the [email protected] install script.
npm ERR! This is probably not a problem with npm. There is likely additional logging output above.

npm ERR! A complete log of this run can be found in:
npm ERR!     /home/pi/.npm/_logs/2020-11-06T22_53_05_702Z-debug.log

node v12.19.0 npm 6.14.8

Is my RPi too old for node v12? Or is it something else? 4 days of fighting so any clue will be appreciated. Thanks