The WT32-SC01 incorporates an ESP32-WROVER-B module with a 3.5-inch capacitive touch display. openHASP can take advantage of the 320x480 resolution to show a large custom user-interface. On the back there is an expansion port with GPIOs so you can expand the capabilities as needed.
|480x320 Display||4 MB flash on basic model|
|8 MB PSram||Viewing angle in landscape mode|
|Capacitive Touchscreen||Mounting holes placement|
The development board is powered via USB Type-C. The basic version comes with only 4MB SPI Flash but there is a better WT32-SC01(16MB) SKU with a larger flash chip. Both models have 8MB of PSRAM.
Please consider getting the model with 16MB flash size as it is more suitable for the large screen.
The expansion connector has a 2.0mm pitch female header instead of the more common 2.54mm pitch.
3D Printed Case~
The Wireless-Tag WT-86-32-3ZW1 is a 86x86mm touchscreen with 4 relays that can be mounted in a standard 86x86mm wall-box. It is currently only available from Alibaba for around US $40 excluding shipping.
|16 MB flash||Display ghosting|
|8 MB PSram||320 kB SRAM (ESP32-S2)|
|Price||Can't fit in EU workbox|
One issue we've noticed is temporary ghosting on the display reported by multiple users. When showing a UI with white, cyan or bright colors on a dark background, a dim ghost image of these bright colors can linger on the screen for some time after changing pages.
If you notice this issue on your device, please report back in this Github discussion thread.
The size of the PSU unit does not fit a regular EU wall-box and mounting it in a US wall-box needs testing.
All pins are conveniently broken out on the 2mm pitch female header. Make sure the USB port can deliver enough power. It is best to use a powered USB hub since most PC ports can not power the whole device.
esptool.py --port COM6 erase_flash esptool.py --port COM6 write_flash 0x0 wt-86-32-3zw1_full_16MB_v0.6.3-dev_88a478d.bin --verify