Air530Z#
Hardware Data#
Information website: air530z.cn
The hardware is divided into two versions, the ordinary version of ‘Air530Z’ and the single Beidou version of ‘Air530Z-BD ‘, the hardware package is exactly the same, the difference is that the software supports different constellations
The built-in GNSS chip is a Zhongke Micro AT6558R, and the single Beidou version has a certification certificate.
Software Information#
For detailed communication protocol, please refer to Air530Z protocol document
Data Link: AT6558R
UART Parameters#
Depending on the batch and package, the default baud rate may be 9600 or 115200
Data bit 8, stop bit 1, no check
Command to switch to 115200 baud rate: ‘$PCAS01,5*19\r\n’ Note that the following’\r\n’ is required, the actual sending is ‘0x0D 0x0A’ 2 bytes
After switching the baud rate, subsequent data will be sent at the new baud rate immediately
UART The level is 3.3V
The highest baud rate supported is 115200, the lowest 9600
Ephemeris information#
Address:
GPS+The Big Dipper Calendar http://download.openluat.com/9501-xingli/CASIC_data.dat
Single Big Dipper Ephemeris http://download.openluat.com/9501-xingli/CASIC_data_bds.dat
Update cycle is 10 minutes once, ephemeris validity: GPS is 4 hours, Beidou is 1 hour
The single Big Dipper ephemeris will be smaller than the GPS Big Dipper ephemeris, which is normal. The Big Dipper ephemeris is a subset of GPS Beidou
Write Method:
Ephemeris itself is a binary file, which can be written directly to the UART RXD port of the module. It can be written in segments (not less than 256 bytes) or once.
The ephemeris itself comes with verification, but there is no return value for writing.
Reminder:
The ephemeris is also continuously received from the satellite while the device is in operation, thereby automatically extending the ephemeris validity period
Keeping the standby power supply without dropping can keep the ephemeris. After the standby power supply is also powered off, the ephemeris will be lost and needs to be injected again.
Adaptation#
lua Library: at6558r for LuatOS
AT Firmware comes with driver
CSDK Please refer example_gnss
Known issues#
As of 2024.6.2, the module software supports Beidou satellites with numbers above 37, but the Beidou ephemeris does not include satellites with numbers above 37. Under certain scenarios, the first positioning time will be extended after the single Beidou module is injected with ephemeris.