Context:
I want to pass a some #define type values to the src, while compiling and uploading to my esp32 from:
- from
platformio.ini
- command line.
Say wifi credentials, for example.
How do I do that?
Current platformio.ini content:
[env:lolin_d32]
platform = espressif32
board = lolin_d32
framework = arduino
lib_deps = PubSubClient
; --------------
; mac OS configs
; --------------
upload_port = /dev/tty.usbserial-130
upload_speed = 460800 ; More than that, doesn't not working
board_build.f_cpu = 240000000L ; sets CPU's frequency to 240 MHz
board_build.f_flash = 80000000L ; sets flash's RW frequency to 80MHz
monitor_port = /dev/tty.usbserial-130
monitor_speed = 115200
build_flags =
-DCORE_DEBUG_LEVEL=0 ; None
; -DCORE_DEBUG_LEVEL=1 ; Error
; -DCORE_DEBUG_LEVEL=2 ; Warn
; -DCORE_DEBUG_LEVEL=3 ; Info
; -DCORE_DEBUG_LEVEL=4 ; Debug
; -DCORE_DEBUG_LEVEL=5 ; Verbose
Current main.cpp content:
// **JUST Test code
#include <Arduino.h>
// #WIFI_SSID "xyz" // want to define this in ini file, how to?
void setup()
{
Serial.begin(115200);
String ssid = WIFI_SSID;
Serial.println(ssid);
}
void loop()
{
}
How do we pass a value form .ini file to the main.cpp for to be included during compilation?
Thanks, I will take it there!
But,
I was talking a look there and followed the guide.
It now compiles, but shows red underline on the macros. I call macros in another file in src directory and not main.ccp (but even in main.cpp, it shows red underline
platformio.ini
[env:lolin_d32]
platform = espressif32
board = lolin_d32
framework = arduino
lib_deps = PubSubClient
board_build.f_cpu = 240000000L ; sets CPU's frequency to 240 MHz
board_build.f_flash = 80000000L ; sets flash's RW frequency to 80MHz
upload_speed = 460800 ; More than that, doesn't not working
monitor_speed = 115200
; --------------
; mac OS configs
; --------------
upload_port = /dev/tty.usbserial-130
monitor_port = /dev/tty.usbserial-130
; ----------------------
; Ubuntu (Linux) configs
; ----------------------
; upload_port = /dev/ttyUSB0
; monitor_port = /dev/ttyUSB0
build_flags =
; --------------------------
; Verbose levels for deubgs
; --------------------------
-DCORE_DEBUG_LEVEL=0 ; None
; -DCORE_DEBUG_LEVEL=1 ; Error
; -DCORE_DEBUG_LEVEL=2 ; Warn
; -DCORE_DEBUG_LEVEL=3 ; Info
; -DCORE_DEBUG_LEVEL=4 ; Debug
; -DCORE_DEBUG_LEVEL=5 ; Verbose
; ------------------------------------------------------------
; External Flags to be passed to the script during compilation
; ------------------------------------------------------------
'-DWIFI_SSID="SDPAP"'
'-DWIFI_PWD="Arpita_1491"'
-DSET_STATIC_IP=.
; Question: Does this mean an empty SET_STATIC_IP will be declared,
; so that the below can happen (in one of the the src director\'s files, say in main.cpp)?
; #ifdef SET_STATIC_IP
; your stuff here
; #endif
I have a config.h
As you can see in the config.h file the macros are still red (But it compiles)
On highlighting one of them, it says: identifier "WIFI_SSID" is undefinedC/C++(20)
And the config.h is called in main.cpp like this:
#include <Arduino.h>
#include "config.h"
Is the above red lining is a linker error for VSCode?
if so, how to solve?
1 Like
Just VS code needed a reload 
It works now
1 Like
