diff --git a/.gitignore b/.gitignore
new file mode 100644
index 0000000..4815d20
--- /dev/null
+++ b/.gitignore
@@ -0,0 +1 @@
+*.mpy
diff --git a/Makefile b/Makefile
index 56af9e6..a4b9601 100644
--- a/Makefile
+++ b/Makefile
@@ -1,12 +1,27 @@
 VENV = poetry run
 ESP_TOOL = $(VENV) esptool.py
+MPYCROSS = $(VENV) mpy-cross
+AMPY = $(VENV) ampy
 
 # Downloaded from https://micropython.org/download/ESP8266_GENERIC/
 MICRO_PYTHON_FIRMWARE = ESP8266_GENERIC-20240222-v1.22.2.bin
 ESP_PORT = /dev/ttyUSB0
 
+src/%.mpy: src/%.py
+	$(MPYCROSS) $<
+
+check: src/*.mpy
+	$(VENV) python3 -m py_compile src/*.py
+
 erase_flash:
 	$(ESP_TOOL) --port $(ESP_PORT) erase_flash
 
 flash_esp: erase_flash
 	$(ESP_TOOL) --port $(ESP_PORT) --baud 460800 write_flash --flash_size=detect 0 $(MICRO_PYTHON_FIRMWARE)
+
+install: check src/*.mpy
+	@echo $(filter-out check,$?)
+	@for f in $(filter-out check,$?); do \
+		echo Uploading $$f; \
+		$(AMPY) --port $(ESP_PORT) put $$f; \
+	done
diff --git a/pyproject.toml b/pyproject.toml
index 1d4e072..dd17ff7 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -11,6 +11,7 @@ python = "^3.12"
 [tool.poetry.group.dev.dependencies]
 adafruit-ampy = "^1.1.0"
 esptool = "^4.7.0"
+mpy-cross = "^1.22.2"
 
 [build-system]
 requires = ["poetry-core"]