WP 34s

WP 34s

HP 30b based WP 34s
Type	Programable, Scientific
Calculator
Entry mode	RPN
Display type	LCD seven-segment display dot-matrix display
Display size	12+3 digits and 8 characters
CPU
Processor	30 MHz Atmel AT91SAM7L128 (ARM7TDMI core)
Programming
Programming language(s)	RPN Keystroke
Program steps	925 steps in RAM
Other
Power supply	2× CR2032 batteries (1 required, 1 optional)
Power consumption	0.25 mW
Weight	115 g
Dimensions	77 × 149 × 16 mm

Flashing the firmware

Table of USB to UART adapters for flashing custom firmware

Board	Manufacturer	UART chip	Chip manufacturer	Status
Metro Mini	Adafruit	FT231x	FTDI	Working
ESP32 devkit v1	Doit/generic	CP2104	Silabs	Working
Arduino Nano	Arduino	FT232RL	FTDI	Unconfirmed
Arduino Nano	Generic	CH340	WCH	Not working
Arduino Mega	Generic	CH340	WCH	Not working
USB-232	Parallax	FT232RL	FTDI	Not working
Arduino Uno	Arduino	Atmega 16u2	Atmel/microchip	Not working
Heltec ESP32	Heltec/generic	CP2102	Silabs	Inconclusive
Metro Mini	Adafruit	CP2102	Silabs	Not tested

See also

• WP 31s
• WP 43s