swap out esphelper for makefile commands to throw m4 into passthrough, upload via esptool, and start the serial

Makefile

@@ -1,4 +1,7 @@
 PROJECT_NAME := nina-fw
+M4_PORT := /dev/cu.usbmodem1431201
+M4_BOOTLOADER := /Volumes/FEATHERBOOT/.
+ESP_PORT := /dev/cu.usbserial-AH03B302
 
 EXTRA_COMPONENT_DIRS := $(PWD)/arduino
 
@@ -14,7 +17,26 @@ endif
 
 include $(IDF_PATH)/make/project.mk
 
+# M4 to USB-Serial Passthrough
+passthrough:
+	cp passthrough.UF2  $(M4_BOOTLOADER)
+	echo "Copied to BOOT!"
+
+# Upload to ESP32 after entering passthrough
+upload:
+	echo "Uploading nina-fw to ESP32"
+	esptool.py --port $(M4_PORT) --before no_reset --baud 115200 write_flash 0 NINA_W102-1.3.1.bin
+
+serial:
+	miniterm.py -p 
+
 firmware: all
 	python combine.py
 
 .PHONY: firmware
+
+.PHONY: passthrough
+
+.PHONY: upload
+
+.PHONY: serial