Documentation, samples and tools for support of VRC-T70 controller.
This repository contains:
- General information about controller.
- Protocol Description.
- Python library which can be used for communication with a VRC-T70 controller;
- Tools and examples that would use a Python library to get current sensors data and servicing functionality.
VRC-T70 is a controller able to communicate with up to 70 widely known DS18B20 sensors, divided in 7 trunks.
Each trunk can contain up to 10 DS18B20sensors, connected using 1-Wire bus.
Controller can be connected to main device (for example PC or any other controller) using RS485 bus. One RS485 network can contain multiple VRC-T70 devices, so real count of connected DS18B20 can be huge and fit your requirements.
VRC-T70 device communicates using open protocol, which documented in ./doc/protocol/protocol_en.md
This repository contains vrc_t70 library that can be used in your Python Program
to communicate with VRC-T70 device(s). Also, it contains some tools which can be useful
when using VRC-T70 controller and can be used as example of an application based on vrc_t70 library.
Available tools:
- Tool for available ports listing.
- Tool for devices searching on a RS-485 bus.
- Tool for temperature information gathering.
pip install vrc_t70
pip install -e git+https://github.com/JFF-Bohdan/vrc_t70@master#egg=vrc_t70
Tools can be used only after VRC-T70 package would be installed.
Example outputs in this document may be outdated. Command line examples are revelant and up to date.
You can find information about all available COM ports in your system by executing:
vrc-t70 list-portsSample output:
$ vrc-t70 list-ports
2024-03-24 22:32:10.139 | INFO | vrc_t70.cli_tools.list_ports:list_ports:15 - Looking for available COM ports ...
2024-03-24 22:32:10.148 | INFO | vrc_t70.cli_tools.list_ports:list_ports:22 - Found 1 port(s)
2024-03-24 22:32:10.151 | INFO | vrc_t70.cli_tools.list_ports:list_ports:43 - Available devices:
+---+------+-------------+------+-------+---------------+--------------+------------------------+
| # | Name | Device name | VID | PID | Serial number | Manufacturer | Description |
+---+------+-------------+------+-------+---------------+--------------+------------------------+
| 0 | COM4 | COM4 | 1027 | 24577 | A50285BIA | FTDI | USB Serial Port (COM4) |
+---+------+-------------+------+-------+---------------+--------------+------------------------+
You can scan RS-485 network for VRC-T70 devices using find_devices tool. It
will ping all devices with addresses from 0x01 up to 0xfe and will log information
about all devices online.
Example command line (find devices with any address, can take ~1.5 minutes for execution):
find_devices --uart com15 --delay 0.1
Where:
--uart com15- specifies uart name. In this caseCOM15in Windows;--delay 0.1- specifis delay of0.1second before sending ping request to device with next address.
Example:
find_devices --uart com15 --min 1 --max 10
Where:
--min 1- minimal device address to check;--max 10- maximal device address to check.
Sample output:
> find_devices --uart com15 --min 1 --max 10
2019-06-17 00:13:59,128 - temp reader - INFO - Searching...
found device with address 0x01
100%|████████████████████████████████████████████████████████████████████████████████████████████████████████████████████████████████████████████████████████████████████████████| 10/10 [00:04<00:00, 2.26rqs/s[{'devices': 1}]] 2019-06-17 00:14:03,298 - temp reader - INFO - :
+-----------------+----------------+
| Timestamp found | Device Address |
+-----------------+----------------+
| 0.06 | 1 [0x01] |
+-----------------+----------------+
2019-06-17 00:14:03,302 - temp reader - INFO - Done. Total_devices_count = 0 (Spent time: 4.17)
in this case script found one device with address 0x01.
You can get information about all temperatures on all connected sensors on all trunks
using get_temperatures. Command line example:
get_temperatures --uart com15 --address 1 --speed 115200
Where:
--uart com15- specifies uart name. In this caseCOM15in Windows;--address 1- specifies device address -0x01;--speed 115200- specifies uart speed,115200if default device speed, so you can skip this parameter.
Sample output:
> get_temperatures --uart com15 --address 1 --speed 115200
2019-06-17 00:16:04,080 - temp reader - DEBUG - app started
2019-06-17 00:16:04,095 - temp reader - INFO - initializing communication with device 1 [0x01]...
2019-06-17 00:16:04,096 - temp reader - INFO - ping
2019-06-17 00:16:04,159 - temp reader - DEBUG - initializing session id with 3a9011c5
2019-06-17 00:16:04,349 - temp reader - DEBUG - session_id = 3a9011c5
2019-06-17 00:16:04,350 - temp reader - DEBUG - scanning for sensors on trunks...
2019-06-17 00:16:04,351 - temp reader - INFO - Rescanning devices on trunks
100%|███████████████████████████████████████████████████████████████████████████████████████████████████████████████████████████████████████████████████████████████████████████████████████████| 7/7 [00:00<00:00, 7.81trunsk/s] 2019-06-17 00:16:05,261 - temp reader - INFO - sensors per trunks:
+------------+---------------+
| Trunk Name | Sensors Count |
+------------+---------------+
| Trunk-2 | 1 |
+------------+---------------+
2019-06-17 00:16:05,262 - temp reader - INFO - bulk data processing commands
100%|███████████████████████████████████████████████████████████████████████████████████████████████████████████████████████████████████████████████████████████████████████████████████████████| 7/7 [00:01<00:00, 5.27trunks/s] 2019-06-17 00:16:06,616 - temp reader - INFO - data for Trunk-2:
+-------+-------------+------------------+
| Index | Temperature | Address |
+-------+-------------+------------------+
| 0 | 29.12 | 28ff0930901504a9 |
+-------+-------------+------------------+
2019-06-17 00:16:06,617 - temp reader - INFO - simple data processing commands
100%|████████████████████████████████████████████████████████████████████████████████████████████████████████████████████████████████████████████████████████████████████████████████████████████| 7/7 [00:00<00:00, 32.11trunk/s] 2019-06-17 00:16:06,840 - temp reader - INFO - data for Trunk-2:
+-------+-------------+------------------+
| Index | Temperature | Address |
+-------+-------------+------------------+
| 0 | 29.12 | 28ff0930901504a9 |
+-------+-------------+------------------+
2019-06-17 00:16:06,841 - temp reader - INFO - retrieving sensors count
100%|███████████████████████████████████████████████████████████████████████████████████████████████████████████████████████████████████████████████████████████████████████████████████████████| 7/7 [00:00<00:00, 10.56trunks/s] 2019-06-17 00:16:07,508 - temp reader - INFO - sensors per trunks:
+------------+---------------+
| Trunk Name | Sensors Count |
+------------+---------------+
| Trunk-2 | 1 |
+------------+---------------+
2019-06-17 00:16:07,621 - temp reader - INFO - application finished
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