tsip 0.4.2

About Python-TSIP

Python-TSIP is a Python package for parsing and creating TSIP packets. The Trimble Standard Interface Protocol (TSIP) is the binary protocol spoken by the GPS receivers sold by Trimble Navigation Ltd. (http://www.trimble.com).

Python-TSIP is available under the “BSD 2-Clause Simplified License”.

I am no longer actively maintaining this project but I am happy to accept merge requests!

Releases up to 0.3.2 supported only Python 2. Any later releases only support Python 3.

Github user pdaderko deserves all credit for making this library compatible with Python 3.

Status

Almost the full set of TSIP command and report packets understood by the Copernicus II receiver has been implemented but so far only some of them have been tested against the actual GPS. Presumably Trimble Thunderbolt and Thunderbolt-E are also supported as they appear to implement a subset of the commands/reports of the (newer) Copernicus II receiver. I don’t have access to any other Trimble products.

Example

The following code shows how to receive the current GPS time from the receiver.

• Command packet 0x21 requests the current GPS time.

• Report packet 0x41 contains the current GPS time. Its fields are accessible by index.

Simple example for Python 3:

import tsip
import serial

# Open serial connection to Trimble receiver
serial_conn = serial.Serial('/dev/ttyUSB0', 9600, timeout=1)
gps_conn = tsip.GPS(serial_conn)

# Prepare and send command packet 0x21
gps_conn.write(tsip.Packet(0x21))

while True:
    try:
        report = gps_conn.read()
        if report[0] == 0x41: #got response to 0x21
            print(f"GPS time of week .......: {report[1]}")
            print(f"Extended GPS week number: {report[2]}")
            print(f"GPS UTC offset .........: {report[3]}")
            break
        else: #some other packet received, output packet number
            print(f"Received packet: {hex(report[0])}")
    except ValueError:
        pass #ignore failed reads

More examples can be found in the docs/examples/ folder but they haven’t been updated to work with Python 3.

History