This is the documentation for the latest (main) development branch of Zephyr. If you are looking for the documentation of previous releases, use the drop-down menu on the left and select the desired version.

TagoIO IoT Cloud HTTP Sample


This sample application implements an HTTP client that will do an HTTP post request to TagoIO 1 IoT Service Platform. The sample sends random temperature values to simulate a real device. This can be used to speed-up development and shows how to send simple JSON data to TagoIO 1 servers.

The source code for this sample application can be found at: samples/net/cloud/tagoio_http_post.


  • A free TagoIO 1 account

  • A board with internet connectivity, see Networking

  • The example provides three ways to get internet:

    • Ethernet: Using default configuration

    • WiFi: Using default configuration plus wifi overlay

    • Modem: Using default configuration plus modem overlay

TagoIO Device Configuration

If you don’t have a TagoIO 1 account, simple create a free account at TagoIO 1. After that, add a device selecting Custom HTTP(S) protocol. That is it! Now reveal your device token. The token will be used to identify your device when sending data. You need fill CONFIG_TAGOIO_DEVICE_TOKEN at samples/net/cloud/tagoio_http_post/prj.conf file with that information.

Building and Running


You can use this application on a supported board with ethernet port. There are many like SAM4E Xplained Pro, SAM V71(B) Xplained Ultra, NXP FRDM-K64F, ST Nucleo F767ZI etc. Pick one and just build tagoio-http-client sample application with minimal configuration:

west build -b [sam4e_xpro | sam_v71_xult | frdm_k64f | nucleo_f767zi] samples/net/cloud/tagoio_http_post
west flash


To enable WIFI support, you need a board with an embedded WIFI support like ST Disco L475 IOT01 (B-L475E-IOT01A) or you can add a shield like ESP-8266 Modules or Inventek es-WIFI Shield. Additionally you need fill CONFIG_TAGOIO_HTTP_WIFI_SSID with your wifi network SSID and CONFIG_TAGOIO_HTTP_WIFI_PSK with the correspondent password at samples/net/cloud/tagoio_http_post/overlay-wifi.conf file.

west build -b disco_l475_iot1 samples/net/cloud/tagoio_http_post -- -DOVERLAY_CONFIG=overlay-wifi.conf
west flash
west build -b [sam_v71_xult | frdm_k64f | nucleo_f767zi] samples/net/cloud/tagoio_http_post -- -DSHIELD=[esp_8266_arduino | inventek_eswifi_arduino_uart] -DOVERLAY_CONFIG=overlay-wifi.conf
west flash


The Modem support is quite similar to WIFI, you need a board with an embedded Modem support or you can add a shield. Currently, the overlay was created to allow modems with PPP support. This was tested using SIMcom SIM808 EVB. Additionally you need fill CONFIG_MODEM_GSM_APN with the correspondent Access Point Name (APN) at samples/net/cloud/tagoio_http_post/overlay-modem.conf file. A DTC overlay file should be used to configure the glue between the modem and the uart port. It can reside at boards directory, with the board name, or it can be a special designator like defined at arduino.overlay.

west build -b sam4e_xpro samples/net/cloud/tagoio_http_post -- -DOVERLAY_CONFIG=overlay-modem.conf
west flash
west build -b frdm_k64f samples/net/cloud/tagoio_http_post -- -DOVERLAY_CONFIG=overlay-modem.conf -DDTC_OVERLAY_FILE=arduino.overlay
west flash

In a terminal window you can check if communication is happen:

$ minicom -D /dev/ttyACM0

*** Booting Zephyr OS build zephyr-v2.4.0-1135-g137732e23c1e  ***

[00:00:02.172,000] <inf> modem_gsm: Manufacturer: SIMCOM_Lt
[00:00:02.227,000] <inf> modem_gsm: Model: SIMCOM_SIM808
[00:00:02.283,000] <inf> modem_gsm: Revision: 1418B04SIM808M32
[00:00:02.338,000] <inf> modem_gsm: IMSI: XXXXXX
[00:00:02.393,000] <inf> modem_gsm: ICCID: XXXXXX
[00:00:02.453,000] <inf> modem_gsm: IMEI: XXXXXX
[00:00:02.574,000] <inf> modem_gsm: Attached to packet service!
[00:00:02.575,000] <inf> net_ppp: Initializing PPP to use UART_3
[00:00:13.370,000] <inf> tagoio: TagoIO IoT - HTTP Client - Temperature demo
[00:00:13.370,000] <inf> tagoio: Temp: 20
[00:00:25.237,000] <inf> tagoio: Temp: 76
[00:00:37.581,000] <inf> tagoio: Temp: 36
[00:00:50.437,000] <inf> tagoio: Temp: 98

Visualizing TagoIO dashboard

After you got some logs on console it is time to create a dashboard on the TagoIO to visualize the data.

  • Go to the TagoIO web console

  • Create a dashboard as Normal, give it a denomination and move next

  • Add a line plot graph. You will see your device, temperature variable will be automatically selected for you.

  • Just Save and enjoy!

TagoIO web dashboard

You can experiment the TagoIO mobile application on your cellphone or tablet. Simple go to your app store and search by TagoIO, install, sign in, enjoy!

TagoIO mobile dashboard

More information at TagoIO 1 and TagoIO Documentation 2.