Programmation sous PlatformIO en mode CLI

$ ls -l $HOME/.platformio/
total 24
-rw-r--r--  1 tv tv  217 avril  1 06:13 appstate.json
-rw-r--r--  1 tv tv 2744 avril  1 06:39 homestate.json
drwxr-xr-x  5 tv tv 4096 mars  26 10:54 lib
drwxr-xr-x 26 tv tv 4096 avril  1 06:51 packages
drwxr-xr-x  6 tv tv 4096 nov.  19  2018 penv
drwxr-xr-x  6 tv tv 4096 avril  1 06:38 platforms

$ ls -l /home/tv/.platformio/packages/
total 96
drwx------  4 tv tv 4096 mars  10 08:30 contrib-piohome
drwx------ 53 tv tv 4096 oct.  24 10:44 contrib-pysite
drwx------  5 tv tv 4096 mars  13  2019 framework-arduinoavr
drwx------  6 tv tv 4096 févr.  5 04:25 framework-arduino-avr
drwx------  6 tv tv 4096 mars  26 10:54 framework-arduinoespressif32
drwx------  8 tv tv 4096 mars  27 18:05 framework-arduinoespressif8266
drwx------ 18 tv tv 4096 avril  1 06:39 framework-mbed
drwx------  2 tv tv 4096 janv. 11 11:50 tool-avrdude
drwx------ 13 tv tv 4096 janv. 11 11:50 toolchain-atmelavr
drwx------  6 tv tv 4096 avril  1 06:38 toolchain-gccarmnoneeabi
drwx------  8 tv tv 4096 mars  27 18:05 toolchain-xtensa
drwx------  8 tv tv 4096 nov.  19  2018 toolchain-xtensa32
drwx------  5 tv tv 4096 janv. 18 08:18 tool-cppcheck
drwx------  5 tv tv 4096 avril  1 06:51 tool-dfuutil
drwx------  2 tv tv 4096 févr. 26  2019 tool-espotapy
drwx------  2 tv tv 4096 mars  27 18:05 tool-esptool
drwx------  6 tv tv 4096 mars  27 18:05 tool-esptoolpy
drwx------  5 tv tv 4096 févr. 26  2019 tool-esptoolpy@1.20600.0
drwx------  2 tv tv 4096 nov.  19  2018 tool-mkspiffs
drwx------  8 tv tv 4096 avril  1 07:57 tool-openocd
drwx------  2 tv tv 4096 avril  1 06:13 tool-pioplus
drwx------  4 tv tv 4096 janv. 11 10:26 tool-scons
drwx------  6 tv tv 4096 avril  1 06:51 tool-stm32duino
drwx------  2 tv tv 4096 mars  23 11:18 tool-unity

$ ls -l /home/tv/.platformio/platforms/
total 16
drwx------ 6 tv tv 4096 janv. 11 11:50 atmelavr
drwx------ 7 tv tv 4096 mars  26 10:54 espressif32
drwx------ 7 tv tv 4096 mars  27 18:05 espressif8266
drwx------ 9 tv tv 4096 avril  1 06:38 ststm32

$ platformio --version
PlatformIO, version 4.3.2a1
$ pio --version
PlatformIO, version 4.3.2a1

$ platformio --help
$ pio --help
Usage: platformio [OPTIONS] COMMAND [ARGS]...

Options:
  --version          Show the version and exit.
  -f, --force        DEPRECATE
  -c, --caller TEXT  Caller ID (service)
  --no-ansi          Do not print ANSI control characters
  -h, --help         Show this message and exit.

Commands:
  account   Manage PIO Account
  boards    Embedded Board Explorer
  check     Run a static analysis tool on code
  ci        Continuous Integration
  debug     PIO Unified Debugger
  device    Monitor device or list existing
  home      PIO Home
  lib       Library Manager
  platform  Platform Manager
  project   Project Manager
  remote    PIO Remote
  run       Process project environments
  settings  Manage PlatformIO settings
  test      Unit Testing
  update    Update installed platforms, packages and libraries
  upgrade   Upgrade PlatformIO to the latest version

$ dmesg
...
[1205723.946447] usb 3-9.2: new full-speed USB device number 45 using xhci_hcd
[1205723.963928] usb 3-9.2: New USB device found, idVendor=0483, idProduct=374b
[1205723.963938] usb 3-9.2: New USB device strings: Mfr=1, Product=2, SerialNumber=3
[1205723.963943] usb 3-9.2: Product: STM32 STLink
[1205723.963948] usb 3-9.2: Manufacturer: STMicroelectronics
[1205723.963952] usb 3-9.2: SerialNumber: 0665FF555051897267243257
[1205723.964177] usb 3-9.2: ep 0x84 - rounding interval to 1024 microframes, ep desc says 2040 microframes
[1205724.022783] scsi28 : usb-storage 3-9.2:1.1
[1205724.650379] cdc_acm 3-9.2:1.2: This device cannot do calls on its own. It is not a modem.
[1205724.650388] cdc_acm 3-9.2:1.2: ttyACM0: USB ACM device
[1205724.650597] usbcore: registered new interface driver cdc_acm
[1205724.650598] cdc_acm: USB Abstract Control Model driver for USB modems and ISDN adapters
[1205725.019733] scsi 28:0:0:0: Direct-Access     MBED     microcontroller  1.0  PQ: 0 ANSI: 2
[1205725.021613] sd 28:0:0:0: Attached scsi generic sg10 type 0
[1205725.022042] sd 28:0:0:0: [sdj] 2120 512-byte logical blocks: (1.08 MB/1.03 MiB)
...

$ lsusb
...
Bus 003 Device 045: ID 0483:374b SGS Thomson Microelectronics

$ ls -l /dev/ttyACM0
crw-rw---- 1 root dialout 166, 0 janv. 23 09:50 /dev/ttyACM0

$ sudo chmod 666 /dev/ttyACM0

$ sudo vim /etc/udev/rules.d/51-usb.rules
SUBSYSTEMS=="usb", ATTRS{idVendor}=="0483", ATTRS{idProduct}=="374b", MODE:="0666"

$ cat /media/DIS_L4IOT/DETAILS.TXT
Version: 0221
Build:   Nov 17 2016 13:37:06

$ pio boards stm32
...

Platform: ststm32
=================================================================================================
ID                         MCU             Frequency    Flash     RAM       Name
-------------------------  --------------  -----------  --------  --------  ----------------------
...
disco_l475vg_iot01a        STM32L475VGT6   80MHz        1MB       128KB     ST DISCO-L475VG-IOT01A
...
nucleo_f401re              STM32F401RET6   84MHz        512KB     96KB      ST Nucleo F401RE
...

$ pio boards disco_l475vg_iot01a

Platform: ststm32
======================================================================================
ID                   MCU            Frequency    Flash    RAM    Name
-------------------  -------------  -----------  -------  -----  ----------------------
disco_l475vg_iot01a  STM32L475VGT6  80MHz        1MB      128KB  ST DISCO-L475VG-IOT01A

$ mkdir -p $HOME/PlatformIO/Projects/st
$ cd $HOME/PlatformIO/Projects/st
$ mkdir disco_l475vg_iot01a
$ cd disco_l475vg_iot01a

$ pio project init --board disco_l475vg_iot01a --project-option="framework=mbed"
The current working directory $HOME/PlatformIO/Projects/st/disco_l475vg_iot01a will be used for the project.

The next files/directories have been created in $HOME/PlatformIO/Projects/st/disco_l475vg_iot01a
include - Put project header files here
lib - Put here project specific (private) libraries
src - Put project source files here
platformio.ini - Project Configuration File

Project has been successfully initialized! Useful commands:
`pio run` - process/build project from the current directory
`pio run --target upload` or `pio run -t upload` - upload firmware to a target
`pio run --target clean` - clean project (remove compiled files)
`pio run --help` - additional information

$ ls -l
total 20
drwxrwxr-x 2 tv tv 4096 avril  1 10:43 include
drwxrwxr-x 2 tv tv 4096 avril  1 10:43 lib
-rw-rw-r-- 1 tv tv  455 avril  1 10:43 platformio.ini
drwxrwxr-x 2 tv tv 4096 avril  1 10:43 src
drwxrwxr-x 2 tv tv 4096 avril  1 10:43 test

$ cat platformio.ini

[env:disco_l475vg_iot01a]
platform = ststm32
board = disco_l475vg_iot01a

$ vim src/main.cpp

#include <mbed.h>

int main()
{
  // put your setup code here, to run once: -> setup()
  printf("Start STM32L475\n");

  while(1)
  {
    // put your main code here, to run repeatedly: -> loop()
  }
}

$ pio run -v
Processing disco_l475vg_iot01a (platform: ststm32; board: disco_l475vg_iot01a; framework: mbed)
----------------------------------------------------------------------------------------
CONFIGURATION: https://docs.platformio.org/page/boards/ststm32/disco_l475vg_iot01a.html
PLATFORM: ST STM32 6.0.0 > ST DISCO-L475VG-IOT01A
HARDWARE: STM32L475VGT6 80MHz, 128KB RAM, 1MB Flash
DEBUG: Current (stlink) On-board (stlink) External (blackmagic, jlink)
PACKAGES:
 - framework-mbed 5.51401.200110 (5.14.1) 
 - toolchain-gccarmnoneeabi 1.70201.0 (7.2.1)
Collecting mbed sources...
...
arm-none-eabi-objcopy -O binary .pio/build/disco_l475vg_iot01a/firmware.elf .pio/build/disco_l475vg_iot01a/firmware.bin
MethodWrapper(["checkprogsize"], [".pio/build/disco_l475vg_iot01a/firmware.elf"])
Advanced Memory Usage is available via "PlatformIO Home > Project Inspect"
RAM:   [          ]   3.1% (used 4008 bytes from 131072 bytes)
Flash: [          ]   4.5% (used 47124 bytes from 1048576 bytes)
.pio/build/disco_l475vg_iot01a/firmware.elf  :
section             size        addr
.text              44348   134217728
.ARM.exidx             8   134262076
.crash_data_ram      256   268435848
.stack              4096   268436104
.heap_0            28024   268440200
.data               2768   536870912
.bss                1240   536873680
.heap              94296   536874920
.ARM.attributes       46           0
.comment             126           0
.debug_info       275822           0
.debug_abbrev      36319           0
.debug_loc         65250           0
.debug_aranges      6320           0
.debug_ranges       7864           0
.debug_line        66047           0
.debug_str         60372           0
.debug_frame       21556           0
Total             714758
============== [SUCCESS] Took 6.57 seconds ==============

$ ls -hl .pio/build/disco_l475vg_iot01a/firmware.elf .pio/build/disco_l475vg_iot01a/firmware.elf 
-rwxrwxr-x 1 tv tv 722K avril  1 11:03 .pio/build/disco_l475vg_iot01a/firmware.elf

$ file .pio/build/disco_l475vg_iot01a/firmware.elf .pio/build/disco_l475vg_iot01a/firmware.elf
.pio/build/disco_l475vg_iot01a/firmware.elf: ELF 32-bit LSB executable, ARM, EABI5 version 1 (SYSV), statically linked, ...

$ ~/.platformio/packages/toolchain-gccarmnoneeabi/bin/arm-none-eabi-size -B -d .pio/build/disco_l475vg_iot01a/firmware.elf
   text    data     bss     dec     hex filename
  44356    2768    5592   52716    cdec .pio/build/disco_l475vg_iot01a/firmware.elf

$ ~/.platformio/packages/toolchain-gccarmnoneeabi/bin/arm-none-eabi-objdump -f .pio/build/disco_l475vg_iot01a/firmware.elf
.pio/build/disco_l475vg_iot01a/firmware.elf:     file format elf32-littlearm
architecture: arm, flags 0x00000012:
EXEC_P, HAS_SYMS
start address 0x080013d1

$ ls -hl .pio/build/disco_l475vg_iot01a/firmware.elf .pio/build/disco_l475vg_iot01a/firmware.bin
-rwxrwxr-x 1 tv tv  47K avril  1 11:03 .pio/build/disco_l475vg_iot01a/firmware.bin

$ ~/.platformio/packages/toolchain-gccarmnoneeabi/bin/arm-none-eabi-strip .pio/build/disco_l475vg_iot01a/firmware.elf

$ pio run -t clean

$ dmesg
...
[201025.006218] scsi 6:0:0:0: Direct-Access     MBED     microcontroller  1.0  PQ: 0 ANSI: 2
[201025.006605] sd 6:0:0:0: Attached scsi generic sg5 type 0
[201025.006845] sd 6:0:0:0: [sde] 2120 512-byte logical blocks: (1.09 MB/1.04 MiB)
[201025.007128] sd 6:0:0:0: [sde] Write Protect is off
[201025.007128] sd 6:0:0:0: [sde] Mode Sense: 03 00 00 00
[201025.007373] sd 6:0:0:0: [sde] No Caching mode page found
[201025.007375] sd 6:0:0:0: [sde] Assuming drive cache: write through
[201025.025663] sd 6:0:0:0: [sde] Attached SCSI removable disk

$ ls -l /media/$USERNAME/DIS_L4IOT/
total 16K
drwxr-xr-x  2 tv   tv   1,0K janv.  1  1970 ./
drwxr-x---+ 5 root root 4,0K avril  1 18:32 ../
-r--r--r--  1 tv   tv     46 mai   27  2004 DETAILS.TXT
-r--r--r--  1 tv   tv    512 mai   27  2006 MBED.HTM

$ cat /media/$USERNAME/DIS_L4IOT/DETAILS.TXT
Version: 0221
Build:   Nov 17 2016 13:37:06

$ cp .pio/build/disco_l475vg_iot01a/firmware.elf .pio/build/disco_l475vg_iot01a/firmware.bin /media/$USERNAME/DIS_L4IOT/

$ pio run -t upload -v
Processing disco_l475vg_iot01a (platform: ststm32; board: disco_l475vg_iot01a; framework: mbed)
----------------------------------------------------------------------------------------
CONFIGURATION: https://docs.platformio.org/page/boards/ststm32/disco_l475vg_iot01a.html
PLATFORM: ST STM32 6.0.0 > ST DISCO-L475VG-IOT01A
HARDWARE: STM32L475VGT6 80MHz, 128KB RAM, 1MB Flash
DEBUG: Current (stlink) On-board (stlink) External (blackmagic, jlink)
PACKAGES:
 - framework-mbed 5.51401.200110 (5.14.1)
 - tool-dfuutil 1.9.200310
 - tool-openocd 2.1000.190707 (10.0)
 - tool-stm32duino 1.0.1
 - toolchain-gccarmnoneeabi 1.70201.0 (7.2.1)
Collecting mbed sources...
...
RAM:   [          ]   3.1% (used 4008 bytes from 131072 bytes)
Flash: [          ]   4.5% (used 47124 bytes from 1048576 bytes)
.pio/build/disco_l475vg_iot01a/firmware.elf  :
section             size        addr
.text              44348   134217728
.ARM.exidx             8   134262076
.crash_data_ram      256   268435848
.stack              4096   268436104
.heap_0            28024   268440200
.data               2768   536870912
.bss                1240   536873680
.heap              94296   536874920
.ARM.attributes       46           0
.comment             126           0
.debug_info       275822           0
.debug_abbrev      36319           0
.debug_loc         65250           0
.debug_aranges      6320           0
.debug_ranges       7864           0
.debug_line        66047           0
.debug_str         60372           0
.debug_frame       21556           0
Total             714758
<lambda>(["upload"], [".pio/build/disco_l475vg_iot01a/firmware.elf"])
AVAILABLE: blackmagic, jlink, mbed, stlink
CURRENT: upload_protocol = stlink
openocd -d2 -s /home/tv/.platformio/packages/tool-openocd/scripts -f board/stm32l4discovery.cfg -c "program {.pio/build/disco_l475vg_iot01a/firmware.elf}  verify reset; shutdown;"
xPack OpenOCD, 64-bit Open On-Chip Debugger 0.10.0+dev (2019-07-17-11:25)
Licensed under GNU GPL v2
...
Info : clock speed 500 kHz
Info : STLINK V2J28M18 (API v2) VID:PID 0483:374B
Info : Target voltage: 3.235743
Info : stm32l4x.cpu: hardware has 6 breakpoints, 4 watchpoints
Info : Listening on port 3333 for gdb connections
...
** Programming Started **
Info : device id = 0x10076415
Info : flash size = 1024kbytes
Warn : block write succeeded
** Programming Finished **
** Verify Started **
** Verified OK **
** Resetting Target **
...
shutdown command invoked
======================= [SUCCESS] Took 7.95 seconds =======================

$ sudo cp $HOME/.platformio/packages/tool-openocd/contrib/60-openocd.rules /etc/udev/rules.d/

$ ~/.platformio/packages/tool-openocd/bin/openocd --version
xPack OpenOCD, 64-bit Open On-Chip Debugger 0.10.0+dev (2019-07-17-11:25)
Licensed under GNU GPL v2
For bug reports, read
    http://openocd.org/doc/doxygen/bugs.html

$ platformio device monitor --help
Usage: platformio device monitor [OPTIONS]

Options:
  -p, --port TEXT       Port, a number or a device name
  -b, --baud INTEGER    Set baud rate, default=9600
  --parity [N|E|O|S|M]  Set parity, default=N
  --rtscts              Enable RTS/CTS flow control, default=Off
  --xonxoff             Enable software flow control, default=Off
  --rts [0|1]           Set initial RTS line state, default=0
  --dtr [0|1]           Set initial DTR line state, default=0
  --echo                Enable local echo, default=Off
  --encoding TEXT       Set the encoding for the serial port (e.g. hexlify,
                        Latin1, UTF-8), default: UTF-8
  -f, --filter TEXT     Add filters / text transformation
  --eol [CR|LF|CRLF]    End of line mode, default=CRLF
  --raw                 Do not apply any encodings/transformations
  --exit-char INTEGER   ASCII code of special character that is used to exit
                        the application, default=29 (DEC)
  --menu-char INTEGER   ASCII code of special character that is used to
                        control miniterm (menu), default=20 (DEC)
  --quiet               Diagnostics: suppress non-error messages, default=Off
  -h, --help            Show this message and exit.

...
upload_port = /dev/ttyUSB0
upload_speed = 115200
monitor_speed = 115200
monitor_filters = colorize, debug
monitor_flags =
    --encoding
    hexlify

$ platformio device list
...
/dev/ttyACM0
------------
Hardware ID: USB VID:PID=0483:374B SER=0672FF555051897267243807 LOCATION=1-4.4.2:1.2
Description: STM32 STLink - ST-Link VCP Ctrl

$ platformio device monitor -p /dev/ttyACM0
--- 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 ---
Start STM32L475

$ platformio device monitor -p /dev/ttyACM0 --encoding hexlify
...
--- Miniterm on /dev/ttyACM0  9600,8,N,1 ---
--- Quit: Ctrl+C | Menu: Ctrl+T | Help: Ctrl+T followed by Ctrl+H ---
53 74 61 72 74 20 53 54 4D 33 32 4C 34 37 35 0A

#include <mbed.h>

DigitalOut led1(LED1);
DigitalOut led2(LED2);
DigitalInOut led34(LED3); // LED3 = LED4
InterruptIn bouton(USER_BUTTON);

int choixLed = 0;
double tempo = 0.1; // 100 ms

void appuiBouton()
{
  choixLed = !choixLed;
}

void commanderLed3(bool etat)
{
  if(etat)
  {
    led34.output();
    led34 = 1;
  }
  else
  {
    led34.input();
  }  
}

void commanderLed4(bool etat)
{
  if(etat)
  {
    led34.output();
    led34 = 0;
  }
  else
  {
    led34.input();
  }
}

int main()
{
  printf("Tests des leds et bouton\n");

  bouton.fall(&appuiBouton);

  while(1)
  {
    if(choixLed)
    {
      led1 = 1;
      wait(tempo);
      led1 = 0;
      wait(tempo*10);
      commanderLed3(1); // orange
    }
    else
    {
      led2 = 1;
      wait(tempo);
      led2 = 0;
      wait(tempo*10);
      commanderLed4(1); // bleue
    }
  }
}

$ pio lib
Usage: pio lib [OPTIONS] COMMAND [ARGS]...

Options:
  -g, --global                 Manager global PlatformIO library storage
  -d, --storage-dir DIRECTORY  Manage custom library storage
  -h, --help                   Show this message and exit.

Commands:
  install    Install library
  list       List installed libraries
  register   Register new library
  search     Search for library
  show       Show details about installed library
  uninstall  Uninstall libraries
  update     Update installed libraries

$ pio lib -g list
Library Storage: $HOME/.platformio/lib
AsyncTCP
========
#ID: 1826
Asynchronous TCP Library for ESP32

Version: 1.1.1
License: LGPL-3.0
Keywords: async, tcp
Compatible frameworks: arduino
Compatible platforms: espressif32
Authors: Hristo Gochkov
...

$ pio lib list
Library Storage: $HOME/Documents/PlatformIO/Projects/st/disco_l475vg_iot01a/.pio/libdeps/disco_l475vg_iot01a
No items found

$ pio lib search es_wifi
Found 1 libraries:

DISCO_L475VG_IOT01A_wifi
========================
#ID: 3438
Wifi driver for DISCO_L475VG_IOT1A es_wifi (Inventek Systems ISM43362-M3G-L44 )

Keywords: disco, iot, wifi
Compatible frameworks: mbed
Compatible platforms: Atmel SAM, Freescale Kinetis, Maxim Integrated MAX32, Nordic nRF51, Nordic nRF52, NXP LPC, Silicon Labs EFM32, ST STM32, Teensy, WIZNet W7500
Authors: ST

$ pio lib install 3438
Library Storage: $HOME/Documents/PlatformIO/Projects/st/disco_l475vg_iot01a/.pio/libdeps/disco_l475vg_iot01a
LibraryManager: Installing id=3438
Downloading  [####################################]  100%
Unpacking  [####################################]  100%
DISCO_L475VG_IOT01A_wifi @ c61a936354 has been successfully installed!

$ pio lib list
Library Storage: /home/tv/Documents/PlatformIO/Projects/st/disco_l475vg_iot01a/.pio/libdeps/disco_l475vg_iot01a
DISCO_L475VG_IOT01A_wifi
========================
#ID: 3438
Wifi driver for DISCO_L475VG_IOT1A es_wifi (Inventek Systems ISM43362-M3G-L44 )

Version: c61a936354
Keywords: disco, iot, wifi
Compatible frameworks: mbed
Compatible platforms: atmelsam, freescalekinetis, maxim32, nordicnrf51, nordicnrf52, nxplpc, siliconlabsefm32, ststm32, teensy, wiznet7500
Authors: ST

$ vim plafortio.ini

[env:disco_l475vg_iot01a]
platform = ststm32
board = disco_l475vg_iot01a
framework = mbed
lib_deps =
  # Bibliothèque es_wifi
  3438

#include <mbed.h>
#include "wifi.h"

uint8_t  MAC_Addr[6];

int main()
{
  printf("Start STM32L475 : client WiFi\n");

  if(WIFI_Init() ==  WIFI_STATUS_OK)
  {
        printf("> WIFI Module Initialized.\n");  
        if(WIFI_GetMAC_Address(MAC_Addr) == WIFI_STATUS_OK)
        {
            printf("> es-wifi module MAC Address : %X:%X:%X:%X:%X:%X\n",
                   MAC_Addr[0],
                   MAC_Addr[1],
                   MAC_Addr[2],
                   MAC_Addr[3],
                   MAC_Addr[4],
                   MAC_Addr[5]);
        }
        else
        {
            printf("> ERROR : CANNOT get MAC address\n");
        }
        ...
  }

  while(1)
  {
    printf(".");
    wait(0.5);
  }
}

$ pio run -v
$ pio run -t upload -v
$ pio device monitor -p /dev/ttyACM0
Start STM32L475 : client WiFi
> WIFI Module Initialized.
> es-wifi module MAC Address : C4:7F:51:4:38:6A
...

#ifndef CLIENTWIFI_H
#define CLIENTWIFI_H

#include "mbed.h"
#include "wifi.h"

#define MAX_TENTATIVES  3

class ClientWiFi
{
    public:
        ClientWiFi();
        bool initialiser(const char *ssid, const char *password, WIFI_Ecn_t type=WIFI_ECN_WPA2_PSK);
        bool connecter(uint8_t *adresseServeur, uint16_t portServeur, WIFI_Protocol_t type=WIFI_TCP_PROTOCOL);
        bool envoyer(uint8_t *donnees, uint16_t longueur, uint16_t *nb, uint32_t timeout=10000);
        bool recevoir(uint8_t *donnees, uint16_t longueur, uint16_t *nb, uint32_t timeout=10000);
        bool estConnecte();

    private:
        int32_t socket;
};

#endif

#include "ClientWiFi.h"

ClientWiFi::ClientWiFi() : socket(-1)
{

}

bool ClientWiFi::initialiser(const char *ssid, const char *password, WIFI_Ecn_t type)
{
    uint8_t  MAC_Addr[6];
    uint8_t  IP_Addr[4];

    if(WIFI_Init() ==  WIFI_STATUS_OK)
    {
        printf("> WIFI Module Initialized.\n");  
        if(WIFI_GetMAC_Address(MAC_Addr) == WIFI_STATUS_OK)
        {
            printf("> es-wifi module MAC Address : %02X:%02X:%X02:%02X:%02X:%02X\n",
                    MAC_Addr[0],MAC_Addr[1], MAC_Addr[2], MAC_Addr[3], MAC_Addr[4], MAC_Addr[5]);
        }
        else
        {
            printf("> ERROR : CANNOT get MAC address\n");
        }
        if(WIFI_Connect(ssid, password, type) == WIFI_STATUS_OK)
        {
            printf("> es-wifi module connected \n");
            if(WIFI_GetIP_Address(IP_Addr) == WIFI_STATUS_OK)
            {
                printf("> es-wifi module got IP Address : %d.%d.%d.%d\n",
                        IP_Addr[0], IP_Addr[1], IP_Addr[2], IP_Addr[3]);
            }
            else
            {
                printf("> ERROR : es-wifi module CANNOT get IP address\n");
            }
        }
        else
        {
            printf("> ERROR : es-wifi module NOT connected\n");
            return false;
        }
    }
    else
    {
        printf("> ERROR : WIFI Module cannot be initialized.\n"); 
        return false;
    }
    return true;
}

bool ClientWiFi::connecter(uint8_t *adresseServeur, uint16_t portServeur, WIFI_Protocol_t type)
{
    uint16_t nbTentatives = MAX_TENTATIVES;

    printf("> Trying to connect to Server: %d.%d.%d.%d:%d ...\n",
                       adresseServeur[0], adresseServeur[1], adresseServeur[2], adresseServeur[3], portServeur);
    while (nbTentatives--)
    {
        if(type == WIFI_TCP_PROTOCOL)
        {
            if(WIFI_OpenClientConnection(0, WIFI_TCP_PROTOCOL, "TCP_CLIENT", adresseServeur, portServeur, 0) == WIFI_STATUS_OK)
            {
                printf("> TCP Connection opened successfully.\n");
                socket = 0;
                return true;
            }
        }
        else if(type == WIFI_UDP_PROTOCOL)
        {
            if(WIFI_OpenClientConnection(0, WIFI_UDP_PROTOCOL, "UDP_CLIENT", adresseServeur, portServeur, 0) == WIFI_STATUS_OK)
            {
                printf("> UDP Connection opened successfully.\n");
                socket = 0;
                return true;
            }
        }
        else
        {
            printf("> ERROR : unknown type Connection\n");
            return false;
        }
    }
    printf("> ERROR : Cannot open Connection\n");

    return false;
}

bool ClientWiFi::recevoir(uint8_t *donnees, uint16_t longueur, uint16_t *nb, uint32_t timeout)
{
    if(socket != -1)
    {
        if(WIFI_ReceiveData(socket, donnees, longueur, nb, timeout) == WIFI_STATUS_OK)
        {
            if(*nb > 0)
            {
                return true;
            }
        }
        else
        {
            printf("> ERROR : Failed to Receive Data.\n");
            return false;
        }
    }
    return false;
}

bool ClientWiFi::envoyer(uint8_t *donnees, uint16_t longueur, uint16_t *nb, uint32_t timeout)
{
    if(socket != -1)
    {
        if(WIFI_SendData(socket, donnees, longueur, nb, timeout) == WIFI_STATUS_OK)
        {
            return true;
        }
        else
        {
            printf("> ERROR : Failed to send Data.\n");
            return false;
        }
    }
    return false;
}

bool ClientWiFi::estConnecte()
{
    if(socket != -1)
    {
        return true;
    }
    return false;
}

#include <mbed.h>
#include"ClientWiFi.h"

const char *ssid = "XXXXXXXX";
const char *password = "xxxxxxxxxxxxxxxx";
uint8_t adresseServeur[] = {192, 168, 52, 12};
uint16_t portServeur = 5000;
uint8_t message[] = "HELLO\n";
uint8_t donnees[256];

ClientWiFi clientWiFi;

int main()
{
  uint16_t nb;

  printf("Start STM32L475 : client WiFi\n");

  if(clientWiFi.initialiser(ssid, password))
  {
    //clientWiFi.connecter(adresseServeur, portServeur); // par défaut WIFI_TCP_PROTOCOL
    clientWiFi.connecter(adresseServeur, portServeur, WIFI_UDP_PROTOCOL);
  }

  while(1)
  {
    if(clientWiFi.estConnecte())
    {
      if(clientWiFi.envoyer(message, sizeof(message), &nb))
      {
        if(clientWiFi.recevoir(donnees, sizeof(donnees), &nb))
        {
          printf("%s", donnees);
        }
      }
      wait(0.5);
    }
  }
}

$ cd include
$ touch config.h
$ code config.h

#ifndef CONFIG_H
#define CONFIG_H

#define MAX_TENTATIVES  3

#endif

#ifndef CLIENTWIFI_H
#define CLIENTWIFI_H

#include "mbed.h"
#include "wifi.h"

#define MAX_TENTATIVES  3

class ClientWiFi
{
    ...
};

#endif

...
build_flags =
  -I./include

$ platformio lib register https://os.mbed.com/users/tvaira/code/DISCO_L475VG_IOT01_HTS221//raw-file/576400702b64/library.json
The library has been successfully registered and is waiting for moderation

#include <mbed.h>
#include "HTS221Sensor.h"

DevI2C devI2c(PB_11,PB_10);
HTS221Sensor capteur(&devI2c);

int main()
{
  uint8_t id;
  float humidite;
  float temperature;

  printf("Start STM32L475 : Humidité & Température\n");

  /* initialise le capteur */
  capteur.init(NULL);

  /* active le capteur */
  capteur.enable();

  capteur.read_id(&id);
  printf("Capteur HTS221 = 0x%X\r\n", id);

  while(1)
  {
    capteur.get_temperature(&temperature);
    capteur.get_humidity(&humidite);
    printf("[capteur HTS221] temperature] = %.2f C - humidite = %.2f%%\r\n", temperature, humidite);

    wait(0.5);
  }
}