Install01
When flashing fails
What to try when the browser or esptool cannot find the Cardputer, cannot connect, or loses the connection halfway.
How-tos
Short recipes for things you will want to do: put a file on the card, record a track, capture radio packets, and what to try when something does not work.
Each recipe is a handful of steps and says what you should see after each one. For what a screen or a key does, the user guide has a page for every App; for quick answers, there is the FAQ.
SD card02
Find your files on the SD card
Where the notes, tracks, captures, logs and saved pages are written, so you can take the card to a computer and use them.
Updates03
Install an update from the SD card
Update the firmware with no Wi-Fi and no cable: copy one file onto the card and install it from the device.
Wi-Fi04
Use a network without DHCP
Give the device a fixed IP address, and your own DNS and time servers, on a network that does not hand out addresses.
GNSS05
Record a Track and open it
Record where you have been with the GNSS receiver, and open the file in a mapping tool.
LoRa Scanner06
Capture LoRa packets and open them in Wireshark
Record what the radio hears into a pcap file, then read it on a computer.
Gemini07
Read Gemini pages offline
Save pages to the SD card, and read them later with Wi-Fi off.
Memory08
When a connection says "not enough memory"
The device has about 107 KB to share, and a secure connection takes about 52 KB. How to free some, and why it happens.