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Wio Terminal in PlatformIO

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Seed Studio offered me a sample device (see specs) for exchange for an article on my blog and I accepted. The device came a few weeks ago so I am fulfilling my part.

When it came, I went to their page and searched for some example code to test and I picked GitHub Stats example. The documentation is pretty good but it describes the usage with original Arduino IDE which is not my weapon of choice. Some time ago I noticed PlatformIO added support for this device so I wanted to use it.

I started by creating a new project.

Then I pasted the source code in but it ended up with an error:

src/main.cpp:2:10: fatal error: WiFiClientSecure.h: No such file or directory

This led mi to following page: https://wiki.seeedstudio.com/Wio-Terminal-Network-Overview/. To use WiFi you need to install several libraries to Arduino. In PIO, you do this by adding following code to your platformio.ini :

lib_deps = 
    https://github.com/Seeed-Studio/Seeed_Arduino_atWiFi
    https://github.com/Seeed-Studio/Seeed_Arduino_FreeRTOS
    https://github.com/Seeed-Studio/Seeed_Arduino_atUnified
    https://github.com/Seeed-Studio/esp-at-lib
    https://github.com/Seeed-Studio/Seeed_Arduino_mbedtls
    https://github.com/Seeed-Studio/Seeed_Arduino_atWiFiClientSecure.git

After doing this, I’ve got a new error:

.pio/libdeps/seeed_wio_terminal/Seeed-Arduino-FreeRTOS/src/FreeRTOSConfig.h:54:3: error: #error architecture not support!
#error architecture not support!

After some investigation I found out I’m missing a build flag:

build_flags =
    -DARDUINO_ARCH_SAMD

Next error was:

src/main.cpp:3:10: fatal error: ArduinoJson.h: No such file or directory

This again means a missing library but this one is specific for the example: https://wiki.seeedstudio.com/Wio-Terminal-Reading-Github/#arduino-libraries-needed so the final lib_deps is following:

lib_deps = 
    https://github.com/Seeed-Studio/Seeed_Arduino_atWiFi
    https://github.com/Seeed-Studio/Seeed_Arduino_FreeRTOS
    https://github.com/Seeed-Studio/Seeed_Arduino_atUnified
    https://github.com/Seeed-Studio/esp-at-lib
    https://github.com/Seeed-Studio/Seeed_Arduino_mbedtls
    https://github.com/Seeed-Studio/Seeed_Arduino_atWiFiClientSecure.git
    https://github.com/Seeed-Studio/Seeed_Arduino_LCD
    https://github.com/bblanchon/ArduinoJson

I also needed to download Free_Fonts.h and put it to src/ directory as described here.

Next error was:

src/main.cpp:120:5: error: 'getData' was not declared in this scope
getData();

So I moved setup() and loop() functions to the end of the file, after getData().

After that, the code compiled and uploaded successfully:

> Executing task in folder wio-github: platformio run --target upload --target monitor <
Processing seeed_wio_terminal (platform: atmelsam; board: seeed_wio_terminal; framework: arduino)
Verbose mode can be enabled via -v, --verbose option
CONFIGURATION: https://docs.platformio.org/page/boards/atmelsam/seeed_wio_terminal.html
PLATFORM: Atmel SAM 4.4.0 > Seeeduino Wio Terminal
HARDWARE: SAMD51P19A 120MHz, 192KB RAM, 496KB Flash
DEBUG: Current (atmel-ice) External (atmel-ice, blackmagic, jlink)
PACKAGES:
framework-arduino-samd-seeed 1.7.6
framework-cmsis 1.40500.0 (4.5.0)
framework-cmsis-atmel 1.2.0
tool-bossac 1.10900.0 (1.9.0)
toolchain-gccarmnoneeabi 1.70201.0 (7.2.1)
LDF: Library Dependency Finder -> http://bit.ly/configure-pio-ldf
LDF Modes: Finder ~ chain, Compatibility ~ soft
Found 41 compatible libraries
Scanning dependencies…
Dependency Graph
|-- <Seeed_Arduino_atWiFi> 1.0 #5576591
| |-- <Seeed_Arduino_atUnifed> 1.0 #c4ae417
| | |-- <esp-at-lib> 1.0 #8c3ecc5
| | | |-- <Seeed-Arduino-FreeRTOS> 1.0.0 #687b036
| | | |-- <SPI> 1.0
| | | | |-- <Adafruit Zero DMA Library> 1.0.4
| | |-- <Seeed-Arduino-FreeRTOS> 1.0.0 #687b036
|-- <Seeed-Arduino-FreeRTOS> 1.0.0 #687b036
|-- <Seeed_Arduino_atUnifed> 1.0 #c4ae417
| |-- <esp-at-lib> 1.0 #8c3ecc5
| | |-- <Seeed-Arduino-FreeRTOS> 1.0.0 #687b036
| | |-- <SPI> 1.0
| | | |-- <Adafruit Zero DMA Library> 1.0.4
| |-- <Seeed-Arduino-FreeRTOS> 1.0.0 #687b036
|-- <esp-at-lib> 1.0 #8c3ecc5
| |-- <Seeed-Arduino-FreeRTOS> 1.0.0 #687b036
| |-- <SPI> 1.0
| | |-- <Adafruit Zero DMA Library> 1.0.4
|-- <Seeed_Arduino_mbedtls> 1.0 #4e74341
| |-- <Seeed_Arduino_atUnifed> 1.0 #c4ae417
| | |-- <esp-at-lib> 1.0 #8c3ecc5
| | | |-- <Seeed-Arduino-FreeRTOS> 1.0.0 #687b036
| | | |-- <SPI> 1.0
| | | | |-- <Adafruit Zero DMA Library> 1.0.4
| | |-- <Seeed-Arduino-FreeRTOS> 1.0.0 #687b036
|-- <Seeed_Arduino_atWiFiClientSecure> 1.0 #952bf0b
| |-- <Seeed_Arduino_atUnifed> 1.0 #c4ae417
| | |-- <esp-at-lib> 1.0 #8c3ecc5
| | | |-- <Seeed-Arduino-FreeRTOS> 1.0.0 #687b036
| | | |-- <SPI> 1.0
| | | | |-- <Adafruit Zero DMA Library> 1.0.4
| | |-- <Seeed-Arduino-FreeRTOS> 1.0.0 #687b036
| |-- <Seeed_Arduino_mbedtls> 1.0 #4e74341
| | |-- <Seeed_Arduino_atUnifed> 1.0 #c4ae417
| | | |-- <esp-at-lib> 1.0 #8c3ecc5
| | | | |-- <Seeed-Arduino-FreeRTOS> 1.0.0 #687b036
| | | | |-- <SPI> 1.0
| | | | | |-- <Adafruit Zero DMA Library> 1.0.4
| | | |-- <Seeed-Arduino-FreeRTOS> 1.0.0 #687b036
| |-- <Seeed_Arduino_atWiFi> 1.0 #5576591
| | |-- <Seeed_Arduino_atUnifed> 1.0 #c4ae417
| | | |-- <esp-at-lib> 1.0 #8c3ecc5
| | | | |-- <Seeed-Arduino-FreeRTOS> 1.0.0 #687b036
| | | | |-- <SPI> 1.0
| | | | | |-- <Adafruit Zero DMA Library> 1.0.4
| | | |-- <Seeed-Arduino-FreeRTOS> 1.0.0 #687b036
|-- <Seeed_Arduino_LCD> 1.6.0 #a9341f1
| |-- <SPI> 1.0
| | |-- <Adafruit Zero DMA Library> 1.0.4
|-- <ArduinoJson> 6.15.2 #7e58347
Building in release mode
Checking size .pio/build/seeed_wio_terminal/firmware.elf
Advanced Memory Usage is available via "PlatformIO Home > Project Inspect"
RAM: [===== ] 48.2% (used 94724 bytes from 196608 bytes)
Flash: [===== ] 47.9% (used 243168 bytes from 507904 bytes)
Configuring upload protocol…
AVAILABLE: atmel-ice, blackmagic, jlink, sam-ba
CURRENT: upload_protocol = sam-ba
Looking for upload port…
Warning! Your /etc/udev/rules.d/99-platformio-udev.rules are outdated. Please update or reinstall them.
Mode details: https://docs.platformio.org/en/latest/faq.html#platformio-udev-rules
Auto-detected: /dev/ttyACM0
Forcing reset using 1200bps open/close on port /dev/ttyACM0
Waiting for the new upload port…
Uploading .pio/build/seeed_wio_terminal/firmware.bin
Write 243168 bytes to flash (475 pages)
[==============================] 100% (475/475 pages)
Done in 2.738 seconds
Verify 243168 bytes of flash
[==============================] 100% (475/475 pages)
Verify successful
Done in 1.506 seconds
======================================================================== [SUCCESS] Took 12.44 seconds ========================================================================
--- Available filters and text transformations: colorize, debug, default, direct, hexlify, log2file, nocontrol, printable, send_on_enter, time
--- More details at http://bit.ly/pio-monitor-filters
--- Miniterm on /dev/ttyACM0 9600,8,N,1 ---
--- Quit: Ctrl+C | Menu: Ctrl+T | Help: Ctrl+T followed by Ctrl+H ---
No ACK, R00
Device reset detected!
ESP-AT Lib initialized!
Attempting to connect to SSID: yourNetworkName
…………

Finally the code was working! So I quickly created file wifi_pass.hwith contents:

#define WIFI_SSID "ssid"
#define WIFI_PASS "password"

and included it in main.cpp like this:

#include "wifi_pass.h"
const char* ssid     = WIFI_SSID;
const char* password = WIFI_PASS;

After this, I got the code to work:

--- Available filters and text transformations: colorize, debug, default, direct, hexlify, log2file, nocontrol, printable, send_on_enter, time
--- More details at http://bit.ly/pio-monitor-filters
--- Miniterm on /dev/ttyACM0 9600,8,N,1 ---
--- Quit: Ctrl+C | Menu: Ctrl+T | Help: Ctrl+T followed by Ctrl+H ---
No ACK, R00
No ACK, R00
Device reset detected!
ESP-AT Lib initialized!
Attempting to connect to SSID: homestead5
………Connected to homestead5
Starting connection to server…
Connected to server!
headers received
closing connection
3
1
17

You can see the result screen here:

You can find my project in this repo: https://github.com/danielkucera/wio-github-stats

One negative note though, to use the WiFi, I had to upgrade it’s firmware as described here. The problem is, that the utility works under Windows only so I spent some time installing Windows. But the guide mentions Linux version coming soon so hopefully it will come soon.

To conclude, I like the device, it’s nice big display and that it works with 5GHz WiFi. It’s ideal for displaying some quick info downloaded from the Internet or smart home data.

One thought on “Wio Terminal in PlatformIO”

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