Pico-pH-SUB
| Manual
© PyroScience GmbH
17
Figure 6: Electrical connectors of Pico-pH
The pin configuration of the connector X1 is given in Table 2
Table 2: Pin configuration of the connector X1
Pin
Name
Function
Description
1
VCC
Power
Power supply
min. 3.3 VDC
max. 5.0 VDC
2
RXD
Digital input
3.0 V levels
(3.3 V & 5 V tolerant)
Data receive line
of the UART interface
3
TXD
Digital output
3.0 V levels
Data transmission line
of the UART interface
4
GND
Power
Ground
5.3
Configuration of the Serial Interface
Pico-pH
is operated via a serial interface, which is realized as a UART interface at 3.0 V
levels (3.3 V and 5 V tolerant) consisting of a receive and a transmit line. The
configuration of the UART-interface is as follows:
19200 baud, 8 data bit, 1 stop bit, no parity, no handshake
Such an UART interface is very common for microcontrollers or microcontroller boards
(e.g. Arduino or Raspberry Pi). The module can be directly connected to such UART
interfaces without any further interface electronics.
