RDing TEMPer

The RDing TEMPer is a USB-based temperature logger.

See RDing TEMPer/Info for more details (such as lsusb -vvv output) about the device.

Hardware

I2C, USB, LED

I2C/USB closeup

Main chip: Tenx TMU3101MS (datasheet)
- The markings were removed, but we're relatively sure it's this chip, due to lsusb and pin/feature matching (see below).
Temperature sensor: Fairchild FM75 (datasheet), I2C slave address 0x4f
I2C EEPROM: Unknown, yet (markings were removed), I2C slave address 0x50
Oscillator: 6MHz

Main chip pinout:

1	2	3	4	5	6	7	8	9	10
SCL	SDA	5V/high	5V/high	5V/high	5V/high	GND	5V/high	3.3V	Oscillator

11	12	13	14	15	16	17	18	19	20
Oscillator	5V/high	USB D-	USB D+	LED (5V)	5V	3.3V			3.3V

I2C EEPROM pinout:

1	2	3	4	5	6	7	8
GND	GND	GND	GND	SDA	SCL	GND	3.3V

See these example sigrok captures for the I2C, USB, and LED traffic going on while the device is queried from the PC (see also screenshots on the right-hand side).

Example usage:

$ sigrok-cli -i rding_temper_i2c_usb_led_sensor_5s.sr -a i2c:sda=0:scl=1
i2c: "START" 
i2c: "ADDRESS READ" "0x4f" 
i2c: "ACK" 
i2c: "DATA READ" "0x1d" 
i2c: "ACK" 
i2c: "DATA READ" "0x80" 
i2c: "ACK" 
i2c: "STOP"

$ sigrok-cli -i rding_temper_i2c_usb_led_sensor_5s.sr -a usb:dm=3:dp=4:signalling=low-speed
usb: "SYNC INVALID!" "001001001100100" 
usb: "SYNC INVALID!" "000000000000110000000111111100100000000010001" 
usb: "SYNC INVALID!" "0000000000011100000011000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000111111001000101111" 
usb: "SYNC INVALID!" "000000000000001001000010011" 
usb: "OUT DEV 47 EP 0" "00000001100001111111010000001001" 
usb: "DATA1 00 00 00 00 00 00 00 00 " "000000011101001000000000000000000000000000000000000000000000000000000000000000001111110100101111" 
usb: "SYNC INVALID!" "00000000101001011" 
usb: "OUT DEV 47 EP 0" "00000001100001111111010000001001" 
usb: "DATA0 00 00 00 00 00 00 00 00 " "000000011100001100000000000000000000000000000000000000000000000000000000000000001111110100101111" 
usb: "SYNC INVALID!" "00000000101001011" 
usb: "IN DEV 47 EP 0" "00000001100101101111010000001001" 
usb: "DATA1 " "00000001110100100000000000000000" 
usb: "ACK " "0000000101001011"