Stores all strings from println and print commands in PROGMEM. to minimaize the .data section.surprised GCC didn't already have this. put this script outside your code directory and run: python3 putStrInPROGMEM.py yourcodedir

storeinPROGMEM.py

#!/usr/bin/python3
#this but for arduino https://www.avrfreaks.net/forum/tut-c-gcc-and-progmem-attribute?page=all
import os
import re
import sys
import pprint

p=re.compile("println\(([^\)]+)\)|print\(([^\)]+)\)")
strings_vars=""
p2v_dict={}
prefix="s_"
fc=0
def rprogmemstr(string):
    vn=prefix+str(len(strings_vars.split("\n")))
    return 'char const {0}[] PROGMEM = {1};'.format(vn,string),vn

def read_all_serialPrint(file):
    for line in file.split("\n"):
        m=edgeCasesCheck(p.findall(line))
        if m==None:
            continue
        addToStringsvar(m)

def addToStringsvar(s):
    global strings_vars
    r=rprogmemstr(s)
    strings_vars+="\n"
    strings_vars+=r[0]
    
    p2v_dict.update({s:r[1]})
    return 

def edgeCasesCheck(p):
    for i in p:
        for s in i:
            if s.startswith('"')==False:
                pass
            else:
                return s


def replace_with_p2v(file):
    f=open(file,'r').read()
    for ps in p2v_dict:
        f=f.replace(ps,p2v_dict[ps])
    open(file,"w").write(strings_vars+"\n"+f)
    return

'''
put this script outside your code directory
and run:
python3 putStrInPROGMEM.py yourcodedir
'''
for i in os.listdir(sys.argv[1]):
    f=os.path.join(sys.argv[1],i)
    print(f)
    fc+=1
    prefix=prefix+str(fc)
    read_all_serialPrint(open(f,"r").read())
    replace_with_p2v(f)
    print("")
    pprint.pprint(p2v_dict)
    p2v_dict={}
    strings_vars=""