To make the GM60 barcode scanner work with an ESP32 using MicroPython, a driver is needed to handle the input/output to the scanner. The driver folder contains this driver, further development resources are located in the docs folder.
This driver is used in another project for inventory handling using Grocy, a great software project.
- Comfortable I/O commands make working with the datasheet easier
- CRC support for incoming and outgoing packets
See example.py for runnable commands.
# Load driver
>>> from gm60_micropython import GM60_Driver
# Initialize UART connection to GM60 barcode scanner
# UART port/naming hint:
# GM60 RX (green cable) needs to be connected to ESP32 TX (e.g. here pin 25)
# GM60 TX (yellow cable) needs to be connected to ESP32 RX (e.g. here pin 26)
>>> scanner = GM60_Driver(rx=26, tx=25)
# Prints hardware and software version information
>>> scanner.get_version()
{'hardware': 1.0, 'software_date': '2021-09-16', 'software': 1.08}
# Resets scanner back to factory settings
>>> scanner.reset_to_factory_defaults()
# Prints register settings in hexadecimal and binary format for easier development
>>> scanner.get_register_settings(0x0000)
(['0x8e'], ['0b10001110'])
# Set LED always on
>>> scanner.set_register_settings(0x0000, 0b10001110)
# Set LED to maximum brightness
>>> scanner.set_register_settings(0x0015, 0x63)
# Read barcode from sensor
>>> scanner.read_barcode()
'4066447241358'
See docs/references.md for other projects using the GM60 barcode scanner. Linked there also is the GM60 datasheet for future reference.