ESP32 Forum

Posted: **Thu May 06, 2021 10:22 am**

Hello Everyone,
I was wondering whether we can put multiple sensors to a single device. It might feel a bit confusing. So, I'll try to explain. Right now if I load the "multi_device" example code to a single ESP32 board, it actually creates 4 different devices in the esp-rainmaker app. It makes sense if there are multiple different types of devices connected to the ESP32. But in my case, I am trying to monitor a couple of sensor Outputs (for example one temperature and one humidity sensor). It would be very convenient if I have only one device in my esp-rainmaker app for one ESP32 board and that device will show both the sensor output inside a single device in two different lines.

Right now based on the example code if I use two ESP32 boards, in the rainmaker app it will show me four devices (ESP1-- Temp, ESP1--Hu, ESP2-- Temp, ESP2-- Hu). But I want one device for one ESP32 board (ESP1-- Temp, Hu)

Hopefully, I was able to explain the scenario. Is it possible to perform such kind of operation? I would really appreciate it if someone can give me detailed info on it.

Thank you.

Posted: **Mon May 17, 2021 5:05 pm**

Hello,

You may use a single device and multiple parameters if that suits your use case. Here's a sample (but untested) code for reference:

Code: Select all

esp_rmaker_device_t *device = esp_rmaker_device_create("Sensor", "my.sensor", NULL);
if (device) {
    esp_rmaker_device_add_param(device, esp_rmaker_name_param_create(ESP_RMAKER_DEF_NAME_PARAM, "Sensor"));

    esp_rmaker_param_t *t_param = esp_rmaker_param_create("Temperature", "my.temperature", esp_rmaker_float(DEF_TEMPERATURE), PROP_FLAG_READ);
    esp_rmaker_device_add_param(device, t_param);

    esp_rmaker_param_t *h_param = esp_rmaker_param_create("Humidity", "my.humidity", esp_rmaker_float(DEF_HUMIDITY), PROP_FLAG_READ);

    esp_rmaker_device_add_param(device, h_param);
}

Let me know if this serves your purpose.

Posted: **Tue May 18, 2021 2:58 pm**

Hello Piyush,
Again thanks a lot

. I'll give it a try and let you know.

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