This has been select as our Cup Compute for 2025. Many other Mesh Stations are available if you want soldered in headers or you do NOT need the built-in battery charger.
WS25a is the cheaper "Lite" version, NOT the "Standard" version:
• ESP32-D0WD chip - Dual Core but No Flash
• Xtensa 32-bit LX6 microprocessor
• Floating Point Unit
• DSP instructions (32-bit multiplier, a 32-bit divider etc.)
• 32 interrupt vectors from about 70 interrupt sources
• JTAG for debugging
Internal Memory
• 448 KB of ROM for booting and core functions
• 520 KB of on-chip SRAM (for data and instructions)
• 8 KB of Fast SRAM in RTC
• 8 KB of Slow SRAM in RTC
• 1 Kbit of eFuse: 256 bits for the system (e.g. MAC address) 768 bits for custom applications
Internal Network
• WiFi 802.11b/g/n
• WiFi 802.11n (20 MHz and 40 MHz)
• WiFi up to 150 Mbps of data rate
• WiFi up to 20.5 dBm of transmitting power
• Bluetooth v4.2 BR/EDR and Bluetooth LE
• Bluetooth Class-1, 2, 3 transmit power with dynamic control up to 24 dB
3. Other Components
Flash
Flash Size: 4MByte (32Mbit)
LED
General Purpose LED can be controlled on GPIO-22
Charging LED
Most models use a CH340G or compatible USB chip, which prefers a 5.0V supply but can handle up to 6.5V maximum, so direct attach to solar panels with 6V output should be OK in most cases.
50 x 75 mm resealable plastic bag (to protect Cup Compute with battery plugged in).
Thicker Bag
The resealable plastic bag is very thin but does help keep Cup Compute, the battery and the cable between them together as a single unit.
If you are dropping the whole thing into your backpack you might need a thicker bag.
Antistatic Bag
You cannot use the antistatic bag that comes with Cup Compute as that will block WiFi and Bluetooth signals. But you should keep that anti-static bag around, so you can reuse it to send your Cup Compute to next owner when you upgrade from a Wireless Station to a Home Station.