diff --git a/src/AR488/AR488.ino b/src/AR488/AR488.ino
index e8f2a79..8aa6e4d 100644
--- a/src/AR488/AR488.ino
+++ b/src/AR488/AR488.ino
@@ -77,6 +77,85 @@
    For further information about the AR488 see the AR488 Manual. 
 */
 
+// decls necessary for arduino-makefile
+void addr_h(char *params);
+void amode_h(char *params);
+void aspoll_h();
+void clr_h();
+void cmode_h(char *params);
+void dcl_h();
+void default_h(char *params);
+void device_gtl_h();
+void device_listen_h();
+void device_llo_h();
+void device_sdc_h();
+void device_spd_h();
+void device_spe_h();
+void device_talk_h();
+void device_tct_h();
+void eoi_h(char *params);
+void eor_h(char *params);
+void eos_h(char *params);
+void eot_char_h(char *params);
+void eot_en_h(char *params);
+void help_h(char *params);
+void id_h(char *params);
+void idn_h(char *params);
+void ifc_h();
+void llo_h(char *params);
+void loc_h(char *params);
+void lon_h(char *params);
+void macro_h(char *params);
+void ppoll_h();
+void prom_h(char *params);
+void read_h(char *params);
+void ren_h(char *params);
+void repeat_h(char *params);
+void rst_h();
+void rtmo_h(char *params);
+void save_h();
+void sendmla_h();
+void sendmsa_h(char *params);
+void sendmta_h();
+void sendsec_h(char *params);
+void setvstr_h(char *params);
+void spoll_h(char *params);
+void srqa_h(char *params);
+void srq_h();
+void stat_h(char *params);
+void tct_h(char *params);
+void ton_h(char *params);
+void trg_h(char *params);
+void unlisten_h();
+void untalk_h();
+void verb_h();
+void ver_h(char *params);
+void xdiag_h(char *params);
+void addPbuf(char c);
+void attnRequired();
+bool device_unl_h();
+bool device_unt_h();
+void execCmd(char *buffr, uint8_t dsize);
+void execGpibCmd(uint8_t gpibcmd);
+void flushPbuf();
+void getCmd(char *buffr);
+bool isCmd(char *buffr);
+bool isIdnQuery(char *buffr);
+void lonMode();
+uint8_t parseInput(char c);
+void sendToInstrument(char *buffr, uint8_t dsize);
+uint8_t serialIn_h();
+void showPrompt();
+void tonMode();
+void hflags_h(char * params);
+void fndl_h(char *params);
+void send_h(char *params);
+void printDbPinout();
+void printCtrlPinout();
+void printDbPinout();
+void printCtrlPinout();
+void printPin(const __FlashStringHelper* pinid, uint8_t pin);
+void showFlag(const __FlashStringHelper* flag);
 
 /*************************************/
 /***** MACRO STRUCTRURES SECTION *****/
diff --git a/src/AR488/Makefile b/src/AR488/Makefile
new file mode 100644
index 0000000..de21a38
--- /dev/null
+++ b/src/AR488/Makefile
@@ -0,0 +1,24 @@
+
+# to upload on specific serial port:
+# MONITOR_PORT=/dev/ttyACM3 make upload
+
+# TODO target to update version FWVER??
+
+# .PHONY: test
+# test: *.h *.cpp
+# 	@rm -f test_bin
+# 	@gcc -o test_bin test.cpp -L /usr/lib64 -lstdc++
+# 	@./test_bin
+
+.PHONY: findserial
+findserial:
+	@./findserial.sh
+
+# comment this out to print arduinoMakefile diagnostics
+ARDUINO_QUIET=1
+
+ARDUINO_DIR=$(HOME)/.arduino-1.8.13/
+ARDMK_DIR=$(HOME)/Arduino/arduinoMakefile
+
+BOARD_TAG    = uno
+include $(ARDMK_DIR)/Arduino.mk
diff --git a/src/AR488/findserial.sh b/src/AR488/findserial.sh
new file mode 100755
index 0000000..eab5178
--- /dev/null
+++ b/src/AR488/findserial.sh
@@ -0,0 +1,21 @@
+#!/bin/sh -e
+
+# A simple script to find serial ports and print some info, assuming they are usb.
+#
+# Note that it will print some errors if there are no such devices present.
+
+if [[ $(uname -s) != "Linux" ]] then
+  echo "sorry, this only works on linux"
+  exit 1
+fi
+
+for t in /sys/class/tty/tty[AU]*; do
+  d=$t/device/../..
+  name=$(basename $t)
+  pid=$(cat $d/idProduct)
+  vid=$(cat $d/idVendor)
+  mfg=$(cat $d/manufacturer)
+  prod=$(cat $d/product)
+  echo "$(tput setaf 2)$name$(tput sgr0) pid=$pid vid=$vid mfg=$mfg prod=$prod"
+done
+echo -e "now, replace the X's and run\n  $(tput setaf 3)MONITOR_PORT=/dev/ttyXXX make upload $(tput sgr0)"