TekPower TP4000ZC

the TekPower TP4000ZC is a 4000 counts handheld digital multimeter with RS232 connectivity.

Hardware

TODO

Photos

TODO

Protocol

The device periodically sends 14-byte packets at 2400 baud, 8n1. The packet includes a mode indicator, payload and checksum. the payload is a 1-1 mapping of the LCD segments.

Packet structure

Byte	7-4	3	2	1	0
0	0x1	AC	DC	Auto	RS232
1	0x2	Negative	1A	1B	1C
2	0x3	1D	1E	1F	1G
3	0x4	DP1	2A	2B	2C
4	0x5	2D	2E	2F	2G
5	0x6	DP2	3A	3B	3C
6	0x7	3D	3E	3F	3G
7	0x8	DP3	4A	4B	4C
8	0x9	4D	4E	4F	4G
9	0xa	u	n	k	Diode
10	0xb	m	%	M	Beep
11	0xc	Farads	Ohms	Rel	Hold
12	0xd	A	V	Hz	Low battery
13	0xe	hFE	Celsius	Reserved	Reserved

Segment lettering

   |--C--|
   |     |
   B     G
   |     |
   |--F--|
   |     |
   A     E
   |     |
   |--D--|

Resources

• [1] (TODO)