6. Host connection
6.1. Serial interface: UART
The configuration in factory state of the UART is 115200 Baud without flow control and with
data format of 8 data Bits, no parity and 1 stop Bit ("8n1"). The baud rate and flow control
of the UART can be configured by means of the UserSetting
. The data
format is fixed to 8n1.
The output of characters on the serial interface runs with secondary priority. For this reason,
short interruptions may occur between the outputs of individual successive Bytes. The host
must not implement too strict timeouts between two Bytes to be able to receive packets that
have interruptions in between.
6.1.1. Reset behaviour
When holding the module’s
pin LOW, the radio chip states are undefined. In this
case the modules
pin may be pulled LOW by the radio module, such that the con-
nected host controller’s UART may detect a 0x00-byte with frame error.
To guarantee a clean UART communication, the host controller may not accept bytes with
frame errors and flush its RX buffer, after pulling the module’s
pin LOW.
Proteus-III reference manual version 1.3
© August 2020
www.we-online.com/wireless-connectivity
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