Newbie Question

[martim]

HI,

I am brand-new to this forum and sorry if I ask stupid questions. I have a Wemos D1 mini without radio. I would like show the sensor data (DS 18B20) on a website served by the Wemos. Or connect it with Homey (mysensors app).

Would that be possible? When I use the code and I would like to comment out the radio part, it won't compile. Is this not possible or do I need to do something else?

Does somebody has maybe an example?

Thanks,

Marcel

[mfalkvidd]

Hi @martim, big welcome to the MySensors community!

Yes, it can be done. You will configure the wemos d1 as a gateway with a local sensor. The gateway can then be added to any controller.

Start with building the plain gateway, by following the instructions at https://www.mysensors.org/build/esp8266_gateway

Verify that it works and add it to your controller. Doing this first small step will save you a lot of time. Trying to do both gateway+sensor in one step is harder.

When the gateway is working, add the temperature example to the gateway sketch and you should be good to go.

[martim]

Hi @mfalkvidd,

Thank you. I have installed the software, can connect to internet. But in the output of serial window I see:

0;255;3;0;9;TSM:INIT
0;255;3;0;9;!TSM:RADIO:FAIL
0;255;3;0;9;!TSM:FAILURE
0;255;3;0;9;TSM:PDT

I can also not access http://<ip>:5003 (not sure if this is possible).

So, without additional code I can try to add it to homey (my controller)?

[mfalkvidd]

@martim sorry, I should have mentioned that you need to remove/comment out this line:

#define MY_RADIO_NRF24

Do that and upload the sketch again.

With the nrf24 code activated, but no radio connected, the gateway won't start properly.

Accessing it through http://<ip>:5003 won't work though, because it is not a web server. I think you could connect to it using telnet though.

[martim]

Hi,

That seems to work :). Would it be possible to simulate a sensor? (To start easy :)) Ooh, and could you also tell me where I can find the documentation of the MySensors library (which function I can use)?

[mfalkvidd]

@martim the documentation is available at the "Download & API" link at the top right of this page
The build examples (including the temperature I linked to earlier) are also good, I like to learn by looking at examples.

Simulating a sensor is a good idea. I don't think we have a "dummy" example though. Maybe we should add one.

[martim]

Hi,

Ok. Thanks for all your help. I need to solder the pins first before I can attach my sensor. A dummy would be indeed helpful. But I will attach the sensor tomorrow after I have solder the header pins.

[mfalkvidd]

@martim your question got my brain churning and today a similar question was posted so here is a dummy sensor: https://forum.mysensors.org/topic/5119/how-to-create-a-fake-local-sensor-on-ethernet-gateway/2

[martim]

Thanks! I will try this!

By the way the documentation in the zip file is more or less empty?

[mfalkvidd]

@martim could you clarify which zip file?

[martim]

@mfalkvidd, when you download the library 2.0 and you extract this. There is a folder documentation which is almost empty. But in the meantime I found also a link api on the download location with more info.

The sketch did work! Great! Based on this example I can going forward.