The controller was not selected. It's working now. Thank you for pointing that out.

Hello @FabioIT, the Node-RED image is defacto a Raspberry Pi OS. You can proceed with any general tutorial for adding the desktop environment, which you can find on the offical Raspberry Pi OS webpage.

Hi @r3sist, what program cycle are you trying to achieve? Typically, you cannot get lower than 10ms.

@Jeff I replied to you over email, but for documentation purposes, I'll reply also here. You can find the connector pinout in the official documentation: https://kb.unipi.technology/en:files:products:03-unipi_1 Martin

It seems like the whole connection up to Codesys is fine. When I delete the UniPi_AI I2C module and instead of that insert the MCP3424, I do get data, but it doesn't seem correct. Even if I leave the Unipi AI module and then use the I2C_master.read(16#68, ADR(baReadBufferV), 4); command, it shows data in the buffers that varies when the input voltage is adjusted.. Does anyone have more info on the UniPi_AI I2C chip driver?

Here's what I'm using in my .gitignore: *.bin bin *.exs *.zip */HmiResources */HMI-*

@OlivierP Thanks for the feedback!

Hi @OlivierP , you can change the byte order via MultiByte Order:

Hello @Neuron_Flo, we tried different approaches, but non of them gave the correct result. There doesn't seem to be a native way how to transform this data in ST code. It looks like you need to resort to the classic calculation according to: https://en.wikipedia.org/wiki/Single-precision_floating-point_format Martin

Hello @FabioIT, the SPI is not used by the Unipi 1.1 and it is not exposed as any port. You can access the SPI on the pin header of the Raspberry Pi, but it would require to create some "hat" that goes between the Rpi and the Unipi 1.1 ribbon connector. Martin

@tomas_hora Hi Tomas, Thank a lot for your tutorial, it work fine. Now I will go to the next step to make a project for home automation Managemet of loads in the house. For this project I will use a hybrid power main and fotovoltaic infrastructure. Now I'm in state to define this project. Tase

Hi @martin_triska, I did a reflash (USB method) of my M525 with latest Mervis OS image (2.3.0.10), firmwares are already up-to-date: unipi@M525-sn8:~$ sudo /opt/unipi/tools/fwspi -i 0 Boardset: 0 B-1000 (v1.0) Baseboard: 0 B-1000 (v2.0) Firmware: v5.50 unipi@M525-sn8:~$ sudo /opt/unipi/tools/fwspi -i 1 Boardset: 19 E-4Ai4Ao_U-R485Di4Ro5 (v1.0) Baseboard: 11 E-4Ai4Ao (v1.0) Firmware: v5.50 From what I've seen after serial communications "crashes", I did not see anymore an i2c-0 error in demsg, so I am not sure this is correlated. Yes: it is a standard Mervis OS image + 2 pythons scripts running as daemons with pymodbus client over ModbusTCP, so no serial communications there. Yes: I am using shielded cable specific for RS485, the bus is properly terminated at each end. Cable shield is properly grounded at PLC side and also to PLC itself. Environment is stable and, so long the issue is not occurring, communication is working perfectly. With the increase of Max telegram duration to 300ms, there is absolutely no error during multiple days: It seems most likely a driver or Mervis runtime issue related to M525 model and port 1.1 !? As I said, I never had the issue when using port 1.3 instead of port 1.1 I have also another RS485 bus on port 2.1 and no issue either. This issue also never occurred with port 1.1 on my previous M505 PLC If you want to try reproduce the issue, you need 3 Inepro PRO380 meters and read constantly multiple values from them like power, energy, voltage. In my case, the maximum uptime before a crash is about 10 days. I can use port 1.3 in the meantime, but I will need the 3rd RS485 port later for my project... But let's check again if it is really stable with port 1.3 over >10 days ! Many thanks in advance and kind regards

this flow gets data from unipi 1.1. unipi lite does not have ai ao. Just skip it. temp input is one wire sensor data. the json all node initializes all variables and then websocket delivers actual data. 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\nmsg.payload = parseFloat(msg.payload.value).toFixed(2);\nreturn msg;","outputs":1,"noerr":0,"x":790,"y":440,"wires":[["7095cd82.073ff4"]]},{"id":"dad4982a.d5fe18","type":"function","z":"cad50249.94c0e","name":"ai 2","func":"var t_loc = \"home/ug/Buero/unipi/1/\";\nmsg.topic = t_loc + msg.payload.dev + \"/\" + msg.payload.circuit; \nmsg.payload = (10.0 - parseFloat(msg.payload.value)).toFixed(2);\n//msg.payload = msg.payload.toFixed(2);\nreturn msg;","outputs":1,"noerr":0,"x":790,"y":480,"wires":[["6749874e.7eb638"]]},{"id":"8e60f8f7.3d3ee8","type":"e-mail","z":"cad50249.94c0e","server":"smtp.gmail.com","port":"465","secure":true,"tls":false,"name":"juntiedt2@gmail.com","dname":"juntiedt2@gmail.com","x":860,"y":180,"wires":[]},{"id":"1e8f1bff.5ff404","type":"moment","z":"cad50249.94c0e","name":"HH:mm:ss DD-MM-YYYY","topic":"","input":"xyz","inputType":"flow","inTz":"Europe/Berlin","adjAmount":0,"adjType":"days","adjDir":"add","format":"HH:mm:ss DD-MM-YYYY","locale":"de_DE","output":"topic","outputType":"msg","outTz":"Europe/Berlin","x":490,"y":180,"wires":[["7b4c23b3.9cfebc"]]},{"id":"fa0726fd.a44fb8","type":"debug","z":"cad50249.94c0e","name":"","active":false,"tosidebar":true,"console":false,"tostatus":false,"complete":"false","x":350,"y":400,"wires":[]},{"id":"5de6d555.65fd4c","type":"inject","z":"cad50249.94c0e","name":"Ubig","topic":"","payload":"","payloadType":"date","repeat":"","crontab":"","once":true,"onceDelay":"1.0","x":110,"y":580,"wires":[["1ec43156.0d3ecf"]]},{"id":"1ec43156.0d3ecf","type":"http request","z":"cad50249.94c0e","name":"http://localhost:8080/json/all","method":"GET","ret":"txt","paytoqs":false,"url":"http://localhost:8080/json/all","tls":"","persist":false,"proxy":"","authType":"","x":320,"y":580,"wires":[["fadb47c7.8068d8"]]},{"id":"b0b395e7.71ed48","type":"catch","z":"cad50249.94c0e","name":"catch no success","scope":["1ec43156.0d3ecf","2dbeaf6.88fdf5"],"uncaught":false,"x":220,"y":640,"wires":[["1bbd0392.3fcfec","63a3399c.45f138"]]},{"id":"63a3399c.45f138","type":"delay","z":"cad50249.94c0e","name":"30 sec","pauseType":"delay","timeout":"30","timeoutUnits":"seconds","rate":"1","nbRateUnits":"1","rateUnits":"second","randomFirst":"1","randomLast":"5","randomUnits":"seconds","drop":false,"x":390,"y":640,"wires":[["1ec43156.0d3ecf"]]},{"id":"1bbd0392.3fcfec","type":"debug","z":"cad50249.94c0e","name":"","active":true,"tosidebar":true,"console":false,"tostatus":false,"complete":"error","targetType":"msg","x":400,"y":680,"wires":[]},{"id":"2dbeaf6.88fdf5","type":"function","z":"cad50249.94c0e","name":"no success","func":"node.error(\"json/all no success\", msg); ","outputs":1,"noerr":0,"x":630,"y":640,"wires":[[]]},{"id":"fadb47c7.8068d8","type":"json","z":"cad50249.94c0e","name":"","property":"payload","action":"","pretty":false,"x":510,"y":580,"wires":[["f4c43419.9505e8"]]},{"id":"f4c43419.9505e8","type":"switch","z":"cad50249.94c0e","name":"success","property":"payload.status","propertyType":"msg","rules":[{"t":"eq","v":"success","vt":"str"},{"t":"else"}],"checkall":"true","repair":false,"outputs":2,"x":640,"y":580,"wires":[["34618e75.c993a2"],["2dbeaf6.88fdf5"]]},{"id":"34618e75.c993a2","type":"function","z":"cad50249.94c0e","name":"split","func":"var ar = msg.payload.data;\nvar i;\nfor (i = 0; i < ar.length; i++) {\n node.send({payload:ar[i]});\n}\nreturn;","outputs":1,"noerr":0,"x":790,"y":580,"wires":[["a813b8d1.c4b208"]]},{"id":"a813b8d1.c4b208","type":"function","z":"cad50249.94c0e","name":"format","func":"/*\nvar t_loc = \"home/ug/Buero/unipi/1/\";\nmsg.topic = t_loc + msg.payload.dev + \"/\" + msg.payload.circuit;\nswitch (msg.payload.dev){\n case \"temp\":\n msg.payload = parseFloat(msg.payload.value).toFixed(2);\n break;\n case \"input\":\n msg.payload = msg.payload.value;\n break; \n case \"relay\":\n msg.payload = msg.payload.value;\n}\nreturn msg;\n*/\n\nvar t_loc = \"home/ug/Buero/unipi/1/\";\nvar mqtt_topic = t_loc + msg.payload.dev + \"/\" + msg.payload.circuit;\nswitch (msg.payload.dev){\n case \"temp\":\n return{payload:parseFloat(msg.payload.value).toFixed(2),topic:mqtt_topic};\n case \"input\":\n return{payload:msg.payload.value,topic:mqtt_topic};\n case \"relay\":\n return{payload:msg.payload.value,topic:mqtt_topic};\n}\nreturn;","outputs":1,"noerr":0,"x":910,"y":580,"wires":[["cdd4d544.02a9f8"]]},{"id":"c52a64.b19355a","type":"comment","z":"cad50249.94c0e","name":"init input, relay, temp","info":"","x":1120,"y":580,"wires":[]},{"id":"6749874e.7eb638","type":"switch","z":"cad50249.94c0e","name":"","property":"payload","propertyType":"msg","rules":[{"t":"neq","v":"","vt":"prev"}],"checkall":"true","repair":false,"outputs":1,"x":910,"y":480,"wires":[["cdd4d544.02a9f8"]]},{"id":"7095cd82.073ff4","type":"switch","z":"cad50249.94c0e","name":"","property":"payload","propertyType":"msg","rules":[{"t":"neq","v":"","vt":"prev"}],"checkall":"true","repair":false,"outputs":1,"x":910,"y":440,"wires":[["cdd4d544.02a9f8"]]},{"id":"84e45387.411c2","type":"websocket-client","z":"","path":"ws://localhost:8080/ws","tls":"","wholemsg":"false"},{"id":"e78c6663.280d38","type":"mqtt-broker","z":"","broker":"10.0.0.43","port":"1883","clientid":"","usetls":false,"compatmode":true,"keepalive":"60","cleansession":true,"birthTopic":"","birthQos":"0","birthPayload":"","willTopic":"","willQos":"0","willPayload":""}]

Hello @Giamba , i was trying to use your dimmer program to to get a 0-10v output on my M203. I'm pretty sure i excactly copied your programm but not the results as you descripe. First of all, it will anly switch between 0 an 10V. no dimming function. Second problem is that i cannot connect the eq_0 / in1 to the BD30 counter to the br. Wont accept. maybe i made a misgtake but i cannot get it. Is it also possible to send me the parameters you use for the components in your programm? Many regards John-paul

Hello @John-paul this seems to be related to the Merivs RunTIme Licensing mechanism which has been introduced in the Mervis IDE 2.3.0 and its runtime. Can you please licence your PLC as described on the tutorial https://kb.unipi.technology/en:sw:01-mervis:use-mervis-runtime-licence-hidden

Hello @ktanghe, the port 1880 is port of Node-RED. You need to write to the port of Evok. I would suggest to download image with Node-RED preinstalled, where you will find example with Dashboard palette as well: https://kb.unipi.technology/en:sw:03-3rd-party:nodered Best regards, Martin

Hi @CKB, the functionality has changed, and now you cannot define more than one task. But you can define more programs to run inside a single task. Best regards, Martin

Hello @ktanghe, unfortunately, on the UniPi 1.1 series (including Lite version) this feature is not supported now. We will consider adding the feature in the next version of Evok. You should prefer a user-naming (aliasing, labelling...) of selected I/Os in the upper-layer software instead of the API tool.