RP6502-RIA-W

RP6502 - RP6502 Interface Adapter W

Introduction

The RP6502 Interface Adapter W is a Raspberry Pi Pico 2 W running the RP6502-RIA-W firmware. It provides all the features of the RP6502-RIA plus wireless services, as described below.

WiFi Setup

The RP6502-RIA-W supports Wi-Fi 4 (802.11n). Configure it through the console interface.

  • Enable/Disable Radio: Use SET RF (0|1) to enable (1, default) or disable (0) all radios without affecting other settings.

  • Set Country Code: SET RFCC (cc|-) sets the WiFi country code for optimal performance (e.g., US, GB). Use help set rfcc to list supported codes. Use - to reset to the worldwide default.

  • Set Network Name (SSID): SET SSID (ssid|-) sets your WiFi network name (Service Set Identifier). Use - to clear.

  • Set Network Password: SET PASS (pass|-) sets your WiFi password. Use - to clear.

  • Check WiFi Status: Use the status command to view current WiFi connection and settings.

Network Time Protocol (NTP)

The real-time clock (RTC) automatically synchronizes with internet time servers when connected to WiFi. Check NTP status with the status command.

  • Set Time Zone: To use local time instead of UTC, set your time zone with SET TZ. Use HELP SET TZ for guidance. Daylight saving adjustments are automatic if your locale observes them. The RP6502-OS provides programmatic access to the clock and time zone.

Once WiFi and time zone are configured, timekeeping is automatic.

Modem Emulation

The RP6502-RIA-W can emulate a Hayes modem for BBS access. Raw TCP and telnet connections are unencrypted in transit.

  • AT Commands: The modem interface supports standard AT commands for dialing, answering, and configuration.

Example AT commands:

  • ATDexample.com:23 — Dial a BBS

  • +++ — Escape back to command mode

  • ATE1 — Set echo

  • ATH — Hang up

  • ATO — Return to call

  • ATQ0 — Set quieting

  • ATSxxx? — Query register number xxx

  • ATSxxx=yyy — Set register number xxx with value yyy

  • ATV1 — Set verbosity

  • ATX0 — Set progress messaging

  • ATZ — Load profile from NVRAM

  • AT&F — Load factory profile

  • AT&V — View profile

  • AT&W — Write profile to NVRAM

  • AT&Z0=example.com:23 — Save “telephone number” to NVRAM

  • AT+RF=0 or AT+RF=1 and AT+RF? — Access RIA setting RF

  • AT+RFCC=your_ssid and AT+RFCC? — Access RIA setting RFCC

  • AT+SSID=your_ssid and AT+SSID? — Access RIA setting SSID

  • AT+PASS=your_pass and AT+PASS? — Access RIA setting PASS

A full telnet stack is not yet implemented, so all connections are raw TCP.

“Telephone Numbers” are saved immediately and are not linked to profiles.

Bluetooth

The RP6502-RIA-W supports Bluetooth LE (BLE) keyboards, mice, and gamepads. Bluetooth Classic (BR/EDR) is not supported. BLE has been widely available since Bluetooth 4.0 (June 2010), so compatible devices are easy to find, though the occasional oddball exists.

To add a new device, use monitor command set ble 2 to enable pairing mode. The LED on the RP6502-RIA-W will blink when in pairing mode. See your device’s manual to enable its pairing mode - probably a button and more blinking. When the blinking stops, the device is connected and will be remembered (bonded) so it reconnects automatically in the future.