@Mykle1
Today, I tried the following:

MM 2.1.2 + Electron 1.7.5 --> CPU 100% during transitions

MM 2.1.2 + Electron 1.4.15 --> problem still there, CPU 100% during transitions

MM 2.1.0 + Electron 1.7.5 --> problem still there, CPU 100% during transitions

MM 2.1.0 + Electron 1.4.15 --> problem (probably) gone, CPU 40% during transitions

So i guess you have to downgrade both, MM and electron…!?

maybe I add the module creator :-)
@BenRoe

Hi all,
I wanted to use the module MMM-Fhem to display the temperature information of my Fhem Heating System.
I followed the Readme. However, when I start the MagicMirror I get following error message:

0|mm       | TypeError: Cannot read property 'Results' of undefined
0|mm       |     at Class.parseJson (/home/pi/MagicMirror/modules/MMM-FHEM/node_helper.js:76:28)
0|mm       |     at /home/pi/MagicMirror/modules/MMM-FHEM/node_helper.js:99:35
0|mm       |     at Request._callback (/home/pi/MagicMirror/modules/MMM-FHEM/node_helper.js:40:9)
0|mm       |     at Request.self.callback (/home/pi/MagicMirror/modules/MMM-FHEM/node_modules/request/request.js:186:22)
0|mm       |     at emitTwo (events.js:106:13)
0|mm       |     at Request.emit (events.js:191:7)
0|mm       |     at Request. (/home/pi/MagicMirror/modules/MMM-FHEM/node_modules/request/request.js:1163:10)
0|mm       |     at emitOne (events.js:96:13)
0|mm       |     at Request.emit (events.js:188:7)
0|mm       |     at IncomingMessage. (/home/pi/MagicMirror/modules/MMM-FHEM/node_modules/request/request.js:1085:12)

I went through my config file over and over again but didn’t find any mistake.
Can somebody help me out finding the root cause for this error. It seems that it tries to read information from an object that is not existing.

Thanks for any help.

my config of this module:

                 {
                 module: 'MMM-FHEM',
                position: 'bottom_bar',
                        config: {
                        host: '192.168.178.58',
                        port: '8083',
                        https: false,
                        devices: [
                          { 
                                deviceName: 'MAX_11cf08',
                                deviceReadings: [
                                      { name: 'temperature', 
                                        icon: 'wi wi-thermometer', 
                                        suffix: '°' },

                                    ],
                          },
                        ]
                        }
                 },

The Fhem information of the specified device:

@Mykle1
Today, I tried the following:

MM 2.1.2 + Electron 1.7.5 --> CPU 100% during transitions

MM 2.1.2 + Electron 1.4.15 --> problem still there, CPU 100% during transitions

MM 2.1.0 + Electron 1.7.5 --> problem still there, CPU 100% during transitions

MM 2.1.0 + Electron 1.4.15 --> problem (probably) gone, CPU 40% during transitions

So i guess you have to downgrade both, MM and electron…!?

@pedroken
I also have v1.7.5 and I do have the problem.
Didn’t find out how to downgrade so I’ll waiting for your results :-)

I’m joing the discussion because I’ve exactly the same problem.
Complete new RPi3 + clean installation but CPU load up to 320%.

Hardware: BCM2835
Revision: a02082
Micro SD: SanDisk Ultra 16Gb

At the moment I can not bring any new hints but you’re not alone ;-)