arlyn-upscale

This repository was adapted from the alicat repository

TCP/Serial driver for Arlyn UpScale Touchscreen Indicator with the RS-232 serial port upgrade option.

Example Connections

Type	Usage
The standard DB9 cable connected directly to a computer (unix: /dev/ttyS0, windows: COM1).	Good with older computers that still have the connector.
The cable connected to a computer through a USB converter (unix: /dev/ttyUSB0, windows: COM1).	Good for newer computers and maker boards such as Raspberry Pis.
The rj45 network port on the Arlyn UpScale Touchscreen Indicator (192.168.1.100:23)	Using the scale over a network connection
Cables routed through a TCP device server (192.168.1.100:23).	Using the scale over a network connection

Installation

git clone https://github.com/treychaffin/arlyn.git
cd alicat/
python setup.py install

Python Usage

Getting the weight string

This .print_weight method inputs the ~*P*~ serial command (shown in the Arlyn UpScale Touchscreen User Manual)

Example Usage

from arlynupscale import Scale

arlyn_address = 'ip-address:port'

async def get_weight_string(scale_address: str) -> str:
    '''Retrieve the weight string from the scale'''
    async with Scale(scale_address) as scale:
        return await scale.get_weight_string()

print(await get_weight_string(arlyn_address))

The method and the function shown will return a string showing the date, time, weight, unit, and whether or not the scale is in net mode.

'03/31/2024 17:28:08, 0.00 kg'

Toggle Unit

This .toggle_unit method inputs the ~*U*~ serial command (shown in the Arlyn UpScale Touchscreen User Manual)

The order in which the scale toggles: kg -> g -> oz -> lb ->

Example Usage

from arlynupscale import Scale

arlyn_address = 'COM6'

async def toggle_unit(scale_address: str) -> None:
    '''Toggles the unit change command'''
    async with Scale(scale_address) as scale:
        await scale.toggle_unit()

await toggle_unit(arlyn_address)

This method and function shown returns nothing

Zero Scale

This .zero_scale method inputs the ~*Z*~ serial command (shown in the Arlyn UpScale Touchscreen User Manual)

Example Usage

from arlynupscale import Scale

arlyn_address = '/dev/ttyS0'

async def zero_scale(scale_address: str) -> None:
    '''Sets the current weight on the scale to zero'''
    async with Scale(scale_address) as scale:
        await scale.zero_scale()

await zero_scale(arlyn_address)

This method and function shown returns nothing

JSON String

This .get_json method inputs the ~*W*~ serial command (shown in the Arlyn UpScale Touchscreen User Manual). The JSON string is converted into a dictionary.

Example Usage

from arlynupscale import Scale

arlyn_address = '/dev/ttyUSB0'

async def get_json(scale_address: str) -> dict:
    '''Retrieve a JSON string of the scales current status'''
    async with Scale(scale_address) as scale:
        return await scale.get_json()

print(await get_json(arlyn_address))

This method and function shown will return a dictionary

{'bSIndi': True, 'sNet': '', 'sUnit': 'kg', 'sWeight': '0.05', '_CMD_ACK': 'ACK', '_id': 1, '_name': '*W', '_rSNo': 42, '_sSNo': 24}

Weight Dictionary

The .get_weight_dict method obtains the the weight string from using the .get_weight_string method. Then, regex is used to extract and organize the information from the string into a dictionary.

Example Usage

from arlynupscale import Scale

arlyn_address = 'ip-address:port'

async def get_weight_dict(scale_address: str) -> dict:
    '''
    Retrieve the weight string from the scale, then extracts the information into 
    a dictionary. Converts weight value into a float
    '''
    async with Scale(scale_address) as scale:
        return await scale.get_weight_dict()

print(await get_weight_dict(arlyn_address))

This method and function shown will return a dictionary:

{'date': '04/05/2024', 'time': '11:39:30', 'weight': 50.0, 'unit': 'g', 'netMode': False}

Change Unit

The .change_unit method used the .toggle_unit method to change the unit value to the desired unit.

Example Usage

from arlynupscale import Scale

arlyn_address = 'COM6'

async def change_unit(scale_address: str, desired_unit: str) -> None:
    '''Toggles through units until scale is set to desired unit'''
    async with Scale(scale_address) as scale:
        return await scale.change_unit(desired_unit)

await change_unit(arlyn_address, 'kg')

This method and function shown does not return anything.