User Manual

4. Parameter of function.
4.1 Support wireless transmission
4.2 Changeable serial port rate and test bit
4.3 Support for transmission data encryption and decryption
4.4 Support for frequency and rate setting
4.5 Support the selective preservation of setting parameters. The MCU control
module does not need to be saved, and it is used separately as a transmission module
4.6 Support the use of external MCU control modules and independent modules
4.7 The serial port port rate, Lora rate, Lora frequency, and secret key within the same
transmission combination need to be consistent, and the inconsistency will lead to
anomalies
4.8 LED lamp (GPIO33) flash at 2S frequency
4.9 Pull GPIO32 down when sending data, sent and dormant
4.10 Export "AT + START\r\n", until it receives this command
Directive configuration and data transfer
4.11 Recovery default serial port port rate is 38400, no verification function
5. Regional division of FLASH
Internal Flash has a total of 128kbytes,page in size of 4k.
Region
Range of region
Byte
Note
DTU routine
are
0x0800_0000~0x0801_EFFF
124K
DTU routine are
INFO
0x0801_F000~0x0801_FFFF
4K
Store some user
information
6. Usage of module
Module use can be controlled by an external MCU and as independent modules using
two, with an arbitrary combination of port rate and rate, the packet length
transmission supports a maximum of 1K (1023Byte) byte data.
6.1 External MCU control
The default GPIO32 of the power is high, the GPIO32 is pulled down during the data
transmission process, and the GPIO32 is high, which can be determined here whether
the broken module is dead, the timeout should be greater than 5.26S (sending 1 K
bytes at SF9,2400 baud rate).
6.2 When the transmission data is greater than 1K, the 1K data is sent first to continue
to send the remaining data when the GPIO32 is restored to high, so that the circular
transmission is sent.