Hi @tekka!
I'm indeed programming the ATMEGA328P using an Arduino Uno transformed as ISP with the ArduinoISP sketch.
I've wired the circuit exactly as shown on the first picture of the tutorial here: https://www.arduino.cc/en/Tutorial/ArduinoToBreadboard. I used the same circuit to burn the bootloader and to upload my sketches.
Your remark makes me wonder: do I really need a bootloader at the end?
Hello @tekka and thank you for your remarks!
Your input makes questions come to my mind:
What is the difference between Optiboot and the bootloader given in the Arduino tutorial? I am quite new to the world of microcontrollers and I don't know much for the moment, I simply use what is working, eh eh 
The configuration you gave here doesn't use the internal 8MHz clock, therefore it doesn't fit my needs here, eh eh. Could I just use the "regular" Arduino Uno bootloader and set the proper fuses values in the boards.txt file to use the internal 8MHz clock?
You are saying that it's actually optiboot which does the page erase and not avrdude? I believed there the "chip erase" instruction is the only instruction possible to erase the flash, handled by avrdude. And according to the ATMEGA328P datasheet (page 297), I have understood that any "chip erase" instruction will also erase the EEPROM if the EESAVE fuse isn't set. That operation seems to be mandatory too as they say: « A Chip Erase must be performed before the Flash and/or EEPROM are reprogrammed ». So, how does Optiboot / avrdude handle that in such a configuration?
Finally, it seems there is no tutorial in the MySensors documentation explaining how to build a project using a standalone ATMEGA328P and which bootloader to choose (there are a few discussions though). It could be worth creating a tutorial / post about that and I could contribute to it of course 
IT WORKS @Anticimex !!! 
The issue was indeed the EESAVE fuse not set, which caused the EEPROM to be erased after each sketch upload.
Here is my modified boards.txt file:
##############################################################
atmega328bb.name=ATmega328 on a breadboard (8 MHz internal clock)
atmega328bb.upload.protocol=arduino
atmega328bb.upload.maximum_size=30720
atmega328bb.upload.speed=57600
atmega328bb.bootloader.low_fuses=0xE2
atmega328bb.bootloader.high_fuses=0xD2
atmega328bb.bootloader.extended_fuses=0x05
atmega328bb.bootloader.file=atmega/ATmegaBOOT_168_atmega328_pro_8MHz.hex
atmega328bb.bootloader.unlock_bits=0x3F
atmega328bb.bootloader.lock_bits=0x0F
atmega328bb.build.board=AVR_ATMEGA328BB
atmega328bb.build.mcu=atmega328p
atmega328bb.build.f_cpu=8000000L
atmega328bb.build.core=arduino:arduino
atmega328bb.build.variant=arduino:standard
atmega328bb.bootloader.tool=arduino:avrdude
atmega328bb.upload.tool=arduino:avrdude
So, basically, for people coming here in the future:
Follow the tutorial https://www.arduino.cc/en/Tutorial/ArduinoToBreadboard to flash the bootloader of your ATMEGA328P but replace the given boards.txt file (in the breadboard-1-6-x.zip archive) by the one above.
A useful link to calculate the fuses values: http://www.engbedded.com/fusecalc/
Thanks for your help @Anticimex, @mfalkvidd and @kimot
@Anticimex: I have just found that there is an EESAVE fuse on the ATMEGA328P which prevents the EEPROM from being erased whenever a new sketch is pushed to the microcontroller.
It seems to be the root cause of the issue since I've found references in other posts of the MySensors forum to that problem.
I'll test that now and let you know.
According to that post, it seems there is a high correlation between the fuses value and the fact that security may or may not work.
Here is the boards.txt file I got from the official "Arduino on a breadboard with internal 8MHz clock" bootloader:
##############################################################
atmega328bb.name=ATmega328 on a breadboard (8 MHz internal clock)
atmega328bb.upload.protocol=arduino
atmega328bb.upload.maximum_size=30720
atmega328bb.upload.speed=57600
atmega328bb.bootloader.low_fuses=0xE2
atmega328bb.bootloader.high_fuses=0xDA
atmega328bb.bootloader.extended_fuses=0x05
atmega328bb.bootloader.file=atmega/ATmegaBOOT_168_atmega328_pro_8MHz.hex
atmega328bb.bootloader.unlock_bits=0x3F
atmega328bb.bootloader.lock_bits=0x0F
atmega328bb.build.board=AVR_ATMEGA328BB
atmega328bb.build.mcu=atmega328p
atmega328bb.build.f_cpu=8000000L
atmega328bb.build.core=arduino:arduino
atmega328bb.build.variant=arduino:standard
atmega328bb.bootloader.tool=arduino:avrdude
atmega328bb.upload.tool=arduino:avrdude
Do you have any clue @Anticimex / @mfalkvidd?
Hmmm... I'm starting to believe that the bootloader i used could be the problem.
Someone using an "alternative" bootloader got problems with signing a few years ago: https://forum.mysensors.org/topic/4991/mysbootloader-1-3pre2-testing/2
Here is what I get with the SecurityPersonalizer sketch directly from GitHub:
+------------------------------------------------------------------------------------+
| MySensors security personalizer |
+------------------------------------------------------------------------------------+
+------------------------------------------------------------------------------------+
| You are running without any configuration flags set. |
| No changes will be made to ATSHA204A or EEPROM except for the EEPROM checksum |
| which will be updated. |
| |
| If you want to personalize your device, you have two options. |
| |
| 1. a. Enable either GENERATE_KEYS_ATSHA204A or GENERATE_KEYS_SOFT |
| This will generate keys for ATSHA204A or software signing. |
| b. Execute the sketch. You will be guided through the steps below under |
| WHAT TO DO NEXT? |
| c. Copy the generated keys and replace the topmost definitions in this file. |
| d. Save the sketch and then disable the flag you just enabled. |
| e. Enable PERSONALIZE_ATSHA204A to personalize the ATSHA204A device. |
| or |
| Enable PERSONALIZE_SOFT to personalize the EEPROM for software signing. |
| If you want to use whitelisting you need to pick a unique serial number |
| for each device you run the sketch on and fill in MY_SOFT_SERIAL. |
| or |
| Enable PERSONALIZE_SOFT_RANDOM_SERIAL to personalzie the EEPROM and |
| include a new random serial number every time the sketch is executed. |
| Take note of each saved serial number if you plan to use whitelisting. |
| f. Execute the sketch on each device you want to personalize that is supposed |
| to communicate securely. |
| |
| 2. Enable any configuration flag as you see fit. |
| It is assumed that you know what you are doing. |
+------------------------------------------------------------------------------------+
+------------------------------------------------------------------------------------+
| Hardware security peripherals |
+--------------+--------------+--------------+------------------------------+--------+
| Device | Status | Revision | Serial number | Locked |
+--------------+--------------+--------------+------------------------------+--------+
| AVR | DETECTED | N/A | N/A (generation required) | N/A |
+--------------+--------------+--------------+------------------------------+--------+
| ATSHA204A | NOT DETECTED | N/A | N/A | N/A |
+--------------+--------------+--------------+------------------------------+--------+
+------------------------------------------------------------------------------------+
| Execution result |
+------------------------------------------------------------------------------------+
| FAILURE (last ATSHA204A return code: 0xE7) |
+------------------------------------------------------------------------------------+
Maybe I've missed something but any #define set will make the code write to the EEPROM.
I ran the SecurityPersonalizer again, it reset the EEPROM to FF's.
I enabled the PERSONALIZE_SOFT_RANDOM_SERIAL flag ran it again and finally re-uploaded my pilot wire code.
I still have that "tempered" message in the logs, I really don't know what I can do...
I may just end up disabling encryption I guess...
I've run the Arduino IDE in "debug" mode to be sure the F_CPU variable was taken into account and it seems it is indeed:
/opt/arduino-1.8.7/arduino-builder -dump-prefs -logger=machine -hardware /opt/arduino-1.8.7/hardware -hardware /home/encrypt/Arduino/hardware -tools /opt/arduino-1.8.7/tools-builder -tools /opt/arduino-1.8.7/hardware/tools/avr -built-in-libraries /opt/arduino-1.8.7/libraries -libraries /home/encrypt/Arduino/libraries -fqbn=breadboard:avr:atmega328bb -vid-pid=0X2341_0X0043 -ide-version=10807 -build-path /tmp/arduino_build_879921 -warnings=none -build-cache /tmp/arduino_cache_286732 -prefs=build.warn_data_percentage=75 -prefs=runtime.tools.avr-gcc.path=/opt/arduino-1.8.7/hardware/tools/avr -prefs=runtime.tools.avr-gcc-5.4.0-atmel3.6.1-arduino2.path=/opt/arduino-1.8.7/hardware/tools/avr -prefs=runtime.tools.avrdude.path=/opt/arduino-1.8.7/hardware/tools/avr -prefs=runtime.tools.avrdude-6.3.0-arduino14.path=/opt/arduino-1.8.7/hardware/tools/avr -prefs=runtime.tools.arduinoOTA.path=/opt/arduino-1.8.7/hardware/tools/avr -prefs=runtime.tools.arduinoOTA-1.2.1.path=/opt/arduino-1.8.7/hardware/tools/avr -verbose /home/encrypt/Documents/Projets/Domotique/Fil_pilote/fil_pilote/fil_pilote.ino
/opt/arduino-1.8.7/arduino-builder -compile -logger=machine -hardware /opt/arduino-1.8.7/hardware -hardware /home/encrypt/Arduino/hardware -tools /opt/arduino-1.8.7/tools-builder -tools /opt/arduino-1.8.7/hardware/tools/avr -built-in-libraries /opt/arduino-1.8.7/libraries -libraries /home/encrypt/Arduino/libraries -fqbn=breadboard:avr:atmega328bb -vid-pid=0X2341_0X0043 -ide-version=10807 -build-path /tmp/arduino_build_879921 -warnings=none -build-cache /tmp/arduino_cache_286732 -prefs=build.warn_data_percentage=75 -prefs=runtime.tools.avr-gcc.path=/opt/arduino-1.8.7/hardware/tools/avr -prefs=runtime.tools.avr-gcc-5.4.0-atmel3.6.1-arduino2.path=/opt/arduino-1.8.7/hardware/tools/avr -prefs=runtime.tools.avrdude.path=/opt/arduino-1.8.7/hardware/tools/avr -prefs=runtime.tools.avrdude-6.3.0-arduino14.path=/opt/arduino-1.8.7/hardware/tools/avr -prefs=runtime.tools.arduinoOTA.path=/opt/arduino-1.8.7/hardware/tools/avr -prefs=runtime.tools.arduinoOTA-1.2.1.path=/opt/arduino-1.8.7/hardware/tools/avr -verbose /home/encrypt/Documents/Projets/Domotique/Fil_pilote/fil_pilote/fil_pilote.ino
Using board 'atmega328bb' from platform in folder: /home/encrypt/Arduino/hardware/breadboard/avr
Using core 'arduino' from platform in folder: /opt/arduino-1.8.7/hardware/arduino/avr
Detecting libraries used...
/opt/arduino-1.8.7/hardware/tools/avr/bin/avr-g++ -c -g -Os -w -std=gnu++11 -fpermissive -fno-exceptions -ffunction-sections -fdata-sections -fno-threadsafe-statics -Wno-error=narrowing -flto -w -x c++ -E -CC -mmcu=atmega328p -DF_CPU=8000000L -DARDUINO=10807 -DARDUINO_AVR_ATMEGA328BB -DARDUINO_ARCH_AVR -I/opt/arduino-1.8.7/hardware/arduino/avr/cores/arduino -I/opt/arduino-1.8.7/hardware/arduino/avr/variants/standard /tmp/arduino_build_879921/sketch/fil_pilote.ino.cpp -o /dev/null
/opt/arduino-1.8.7/hardware/tools/avr/bin/avr-g++ -c -g -Os -w -std=gnu++11 -fpermissive -fno-exceptions -ffunction-sections -fdata-sections -fno-threadsafe-statics -Wno-error=narrowing -flto -w -x c++ -E -CC -mmcu=atmega328p -DF_CPU=8000000L -DARDUINO=10807 -DARDUINO_AVR_ATMEGA328BB -DARDUINO_ARCH_AVR -I/opt/arduino-1.8.7/hardware/arduino/avr/cores/arduino -I/opt/arduino-1.8.7/hardware/arduino/avr/variants/standard -I/home/encrypt/Arduino/libraries/MySensors /tmp/arduino_build_879921/sketch/fil_pilote.ino.cpp -o /dev/null
/opt/arduino-1.8.7/hardware/tools/avr/bin/avr-g++ -c -g -Os -w -std=gnu++11 -fpermissive -fno-exceptions -ffunction-sections -fdata-sections -fno-threadsafe-statics -Wno-error=narrowing -flto -w -x c++ -E -CC -mmcu=atmega328p -DF_CPU=8000000L -DARDUINO=10807 -DARDUINO_AVR_ATMEGA328BB -DARDUINO_ARCH_AVR -I/opt/arduino-1.8.7/hardware/arduino/avr/cores/arduino -I/opt/arduino-1.8.7/hardware/arduino/avr/variants/standard -I/home/encrypt/Arduino/libraries/MySensors -I/opt/arduino-1.8.7/hardware/arduino/avr/libraries/SPI/src /tmp/arduino_build_879921/sketch/fil_pilote.ino.cpp -o /dev/null
Using cached library dependencies for file: /home/encrypt/Arduino/libraries/MySensors/MyASM.S
Using cached library dependencies for file: /opt/arduino-1.8.7/hardware/arduino/avr/libraries/SPI/src/SPI.cpp
Generating function prototypes...
/opt/arduino-1.8.7/hardware/tools/avr/bin/avr-g++ -c -g -Os -w -std=gnu++11 -fpermissive -fno-exceptions -ffunction-sections -fdata-sections -fno-threadsafe-statics -Wno-error=narrowing -flto -w -x c++ -E -CC -mmcu=atmega328p -DF_CPU=8000000L -DARDUINO=10807 -DARDUINO_AVR_ATMEGA328BB -DARDUINO_ARCH_AVR -I/opt/arduino-1.8.7/hardware/arduino/avr/cores/arduino -I/opt/arduino-1.8.7/hardware/arduino/avr/variants/standard -I/home/encrypt/Arduino/libraries/MySensors -I/opt/arduino-1.8.7/hardware/arduino/avr/libraries/SPI/src /tmp/arduino_build_879921/sketch/fil_pilote.ino.cpp -o /tmp/arduino_build_879921/preproc/ctags_target_for_gcc_minus_e.cpp
/opt/arduino-1.8.7/tools-builder/ctags/5.8-arduino11/ctags -u --language-force=c++ -f - --c++-kinds=svpf --fields=KSTtzns --line-directives /tmp/arduino_build_879921/preproc/ctags_target_for_gcc_minus_e.cpp
Compilation du croquis...
/opt/arduino-1.8.7/hardware/tools/avr/bin/avr-g++ -c -g -Os -w -std=gnu++11 -fpermissive -fno-exceptions -ffunction-sections -fdata-sections -fno-threadsafe-statics -Wno-error=narrowing -MMD -flto -mmcu=atmega328p -DF_CPU=8000000L -DARDUINO=10807 -DARDUINO_AVR_ATMEGA328BB -DARDUINO_ARCH_AVR -I/opt/arduino-1.8.7/hardware/arduino/avr/cores/arduino -I/opt/arduino-1.8.7/hardware/arduino/avr/variants/standard -I/home/encrypt/Arduino/libraries/MySensors -I/opt/arduino-1.8.7/hardware/arduino/avr/libraries/SPI/src /tmp/arduino_build_879921/sketch/fil_pilote.ino.cpp -o /tmp/arduino_build_879921/sketch/fil_pilote.ino.cpp.o
Compiling libraries...
Compiling library "MySensors"
Utilisation du fichier déjà compilé : /tmp/arduino_build_879921/libraries/MySensors/MyASM.S.o
Compiling library "SPI"
Utilisation du fichier déjà compilé : /tmp/arduino_build_879921/libraries/SPI/SPI.cpp.o
Compiling core...
Using precompiled core: /tmp/arduino_cache_286732/core/core_breadboard_avr_atmega328bb_8bcbb10bb0e7a5b614c24d1e9ac07d80.a
Linking everything together...
/opt/arduino-1.8.7/hardware/tools/avr/bin/avr-gcc -w -Os -g -flto -fuse-linker-plugin -Wl,--gc-sections -mmcu=atmega328p -o /tmp/arduino_build_879921/fil_pilote.ino.elf /tmp/arduino_build_879921/sketch/fil_pilote.ino.cpp.o /tmp/arduino_build_879921/libraries/MySensors/MyASM.S.o /tmp/arduino_build_879921/libraries/SPI/SPI.cpp.o /tmp/arduino_build_879921/../arduino_cache_286732/core/core_breadboard_avr_atmega328bb_8bcbb10bb0e7a5b614c24d1e9ac07d80.a -L/tmp/arduino_build_879921 -lm
/opt/arduino-1.8.7/hardware/tools/avr/bin/avr-objcopy -O ihex -j .eeprom --set-section-flags=.eeprom=alloc,load --no-change-warnings --change-section-lma .eeprom=0 /tmp/arduino_build_879921/fil_pilote.ino.elf /tmp/arduino_build_879921/fil_pilote.ino.eep
/opt/arduino-1.8.7/hardware/tools/avr/bin/avr-objcopy -O ihex -R .eeprom /tmp/arduino_build_879921/fil_pilote.ino.elf /tmp/arduino_build_879921/fil_pilote.ino.hex
Utilisation de la bibliothèque MySensors version 2.3.1 dans le dossier: /home/encrypt/Arduino/libraries/MySensors
Utilisation de la bibliothèque SPI version 1.0 dans le dossier: /opt/arduino-1.8.7/hardware/arduino/avr/libraries/SPI
/opt/arduino-1.8.7/hardware/tools/avr/bin/avr-size -A /tmp/arduino_build_879921/fil_pilote.ino.elf
Le croquis utilise 21394 octets (69%) de l'espace de stockage de programmes. Le maximum est de 30720 octets.
Les variables globales utilisent 1022 octets de mémoire dynamique.
Now, to answer your question @Anticimex, how do you run the SecurityPersonalizer sketch to only print the content of the EEPROM and not do any write? I've commented out all options but now it reports that no #define has been set 
Hello again,
I don't know why I'm getting that "!SGN:PER:Tampered" message...
I've run the SecurityPersonalizer sketch again and it reported that everything went as expected:
+------------------------------------------------------------------------------------+
| MySensors security personalizer |
+------------------------------------------------------------------------------------+
+------------------------------------------------------------------------------------+
| Configuration settings |
+------------------------------------------------------------------------------------+
| * Guided personalization/storage of keys in EEPROM |
| * Software based personalization (no ATSHA204A usage whatsoever) |
| * Will not require any UART confirmations |
| * Will store HMAC key to EEPROM |
| * Will store AES key to EEPROM |
| * Will generate soft serial using software |
| * Will store soft serial to EEPROM |
+------------------------------------------------------------------------------------+
+------------------------------------------------------------------------------------+
| Hardware security peripherals |
+--------------+--------------+--------------+------------------------------+--------+
| Device | Status | Revision | Serial number | Locked |
+--------------+--------------+--------------+------------------------------+--------+
| AVR | DETECTED | N/A | N/A (generation required) | N/A |
+--------------+--------------+--------------+------------------------------+--------+
+------------------------------------------------------------------------------------+
| Key generation |
+--------+--------+------------------------------------------------------------------+
| Key ID | Status | Key |
+--------+--------+------------------------------------------------------------------+
| SERIAL | OK | 2DFECBDAE05BB8414C |
+--------+--------+------------------------------------------------------------------+
+------------------------------------------------------------------------------------+
| Key copy section |
+------------------------------------------------------------------------------------+
#define MY_SOFT_SERIAL 0x2D,0xFE,0xCB,0xDA,0xE0,0x5B,0xB8,0x41,0x4C
+------------------------------------------------------------------------------------+
+------------------------------------------------------------------------------------+
| Key storage |
+--------+--------+------------------------------------------------------------------+
| Key ID | Status | Key |
+--------+--------+------------------------------------------------------------------+
| HMAC | OK | XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX |
| AES | OK | XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX |
| SERIAL | OK | 2DFECBDAE05BB8414C |
+--------+--------+------------------------------------------------------------------+
+------------------------------------------------------------------------------------+
| EEPROM |
+--------+--------+------------------------------------------------------------------+
| Key ID | Status | Key |
+--------+--------+------------------------------------------------------------------+
| HMAC | OK | XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX |
| AES | OK | XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX |
| SERIAL | OK | 2DFECBDAE05BB8414C |
+--------+--------+------------------------------------------------------------------+
+------------------------------------------------------------------------------------+
| This nodes whitelist entry on other nodes |
+------------------------------------------------------------------------------------+
{.nodeId = <ID of this node>,.serial = {0x2D,0xFE,0xCB,0xDA,0xE0,0x5B,0xB8,0x41,0x4C}}
+------------------------------------------------------------------------------------+
+------------------------------------------------------------------------------------+
| WHAT TO DO NEXT? |
+------------------------------------------------------------------------------------+
| This device has now been personalized. Run this sketch with its current settings |
| on all the devices in your network that have security enabled. |
+------------------------------------------------------------------------------------+
+------------------------------------------------------------------------------------+
| Execution result |
+------------------------------------------------------------------------------------+
| SUCCESS |
+------------------------------------------------------------------------------------+
Also, note I'm running the latest version of the SecurityPersonalizer sketch, which can be found here: https://github.com/mysensors/MySensors/blob/development/examples/SecurityPersonalizer/SecurityPersonalizer.ino
I really don't know what can be wrong here...
Could the 8MHz internal clock be the faulty part? Maybe it fails to correctly read the EEPROM data due to a misconfigured clock?
Here is what avrdude shows in the debug view of the Arduino IDE ; using the Arduino Uno as a programmer:
/opt/arduino-1.8.7/hardware/tools/avr/bin/avrdude -C/opt/arduino-1.8.7/hardware/tools/avr/etc/avrdude.conf -v -patmega328p -carduino -P/dev/ttyACM0 -b19200 -Uflash:w:/tmp/arduino_build_879921/fil_pilote.ino.hex:i
avrdude: Version 6.3-20171130
Copyright (c) 2000-2005 Brian Dean, http://www.bdmicro.com/
Copyright (c) 2007-2014 Joerg Wunsch
System wide configuration file is "/opt/arduino-1.8.7/hardware/tools/avr/etc/avrdude.conf"
User configuration file is "/home/encrypt/.avrduderc"
User configuration file does not exist or is not a regular file, skipping
Using Port : /dev/ttyACM0
Using Programmer : arduino
Overriding Baud Rate : 19200
AVR Part : ATmega328P
Chip Erase delay : 9000 us
PAGEL : PD7
BS2 : PC2
RESET disposition : dedicated
RETRY pulse : SCK
serial program mode : yes
parallel program mode : yes
Timeout : 200
StabDelay : 100
CmdexeDelay : 25
SyncLoops : 32
ByteDelay : 0
PollIndex : 3
PollValue : 0x53
Memory Detail :
Block Poll Page Polled
Memory Type Mode Delay Size Indx Paged Size Size #Pages MinW MaxW ReadBack
----------- ---- ----- ----- ---- ------ ------ ---- ------ ----- ----- ---------
eeprom 65 20 4 0 no 1024 4 0 3600 3600 0xff 0xff
flash 65 6 128 0 yes 32768 128 256 4500 4500 0xff 0xff
lfuse 0 0 0 0 no 1 0 0 4500 4500 0x00 0x00
hfuse 0 0 0 0 no 1 0 0 4500 4500 0x00 0x00
efuse 0 0 0 0 no 1 0 0 4500 4500 0x00 0x00
lock 0 0 0 0 no 1 0 0 4500 4500 0x00 0x00
calibration 0 0 0 0 no 1 0 0 0 0 0x00 0x00
signature 0 0 0 0 no 3 0 0 0 0 0x00 0x00
Programmer Type : Arduino
Description : Arduino
Hardware Version: 2
Firmware Version: 1.18
Topcard : Unknown
Vtarget : 0.0 V
Varef : 0.0 V
Oscillator : Off
SCK period : 0.1 us
avrdude: AVR device initialized and ready to accept instructions
Reading | ################################################## | 100% 0.01s
avrdude: Device signature = 0x1e950f (probably m328p)
avrdude: NOTE: "flash" memory has been specified, an erase cycle will be performed
To disable this feature, specify the -D option.
avrdude: erasing chip
avrdude: reading input file "/tmp/arduino_build_879921/fil_pilote.ino.hex"
avrdude: writing flash (21394 bytes):
Writing | ################################################## | 100% 23.60s
avrdude: 21394 bytes of flash written
avrdude: verifying flash memory against /tmp/arduino_build_879921/fil_pilote.ino.hex:
avrdude: load data flash data from input file /tmp/arduino_build_879921/fil_pilote.ino.hex:
avrdude: input file /tmp/arduino_build_879921/fil_pilote.ino.hex contains 21394 bytes
avrdude: reading on-chip flash data:
Reading | ################################################## | 100% 13.37s
avrdude: verifying ...
avrdude: 21394 bytes of flash verified
avrdude done. Thank you.