add makefile, rename main

Makefile

@@ -0,0 +1,37 @@
+BOARD :=	sparkfun_esp32micromod
+FIRMWARE :=	.pioenvs/$(BOARD)/firmware.bin
+SOURCES :=					\
+		src/main.cc
+
+PIO :=	pio run -e $(BOARD)
+
+$(FIRMWARE): $(SOURCES)
+	$(PIO)
+
+PHONY: all
+all: $(FIRMWARE)
+
+.PHONY: upload
+upload: $(FIRMWARE)
+	$(PIO) -t upload
+
+.PHONY: monitor
+monitor:
+	$(PIO) -t monitor
+
+.PHONY: deploy
+deploy: $(FIRMWARE)
+	$(PIO) -t upload && sleep 0.5 && $(PIO) -t monitor
+
+.PHONY: clean
+clean:
+	$(PIO) -t clean
+
+.PHONY: cloc
+cloc:
+	cloc include lib src
+
+.PHONY: test
+test:
+	$(PIO) -t test
+