JI1FGX/DU9 Amateur Radio Diary, Mindanao, Philippines, IOTA OC-130
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A diary of life in Mindanao.
26/05/21  JTDX Auto Run BUGFIX
26/05/17  Repair of satellite antenna system
26/05/13  Repair of Alinco DR130
26/05/07  Making a Repeater Controller Pert3
26/05/03  Indonesian satellite friend YC8RPK
26/04/26  DXCC200 achieved
26/04/23  Communication via ISS voice repeater
26/04/20  WSJT-X Auto Run Ver0.1.5
26/04/19  Got an Alinco DR-130
26/04/15  Clublog Charts
26/04/10  Regarding POC transceivers
26/04/08  Using KENWOOD AT-300 with YAESU radio
26/03/17  How to establish a radio club in the Philippines
26/03/10  KENWOOD AT-300 with YAESU radio
26/02/27  Philippine NTC Amateur Radio License Examination Question Bank
26/02/20  Package received from JK1SNS
26/02/18  Temporary License Renewal
26/02/14  Satellite Tracking Software SatTrack
26/02/05  Making a Repeater Controller Pert2
26/02/02  CQ on satellite IO-86
26/01/27  Shack & Repeater Controller
26/01/16  Making a Repeater Controller
26/01/16  Making aRotator Interface PCB
26/01/10  Satellite antenna installation
26/01/08 WSJT-X Remote Operation
26/01/07 JTDX Remote Operation
26/01/04  log_reciver_Ver2.6.6
26/01/04  Tailscale VPN software for JTDX_Remote

Online Multiple Choice Reviewers to
the Phil Amateur Radio Examination
by 4F3EW


A joint project by JI1FGX/DU9 and DV9JRD
Making a Repeater Controller Pert3 (2026/05/07)
I am working on it.Repeater controller.The microcontroller (MCU) of...Adruin Mega 2560 Rev3.from.ESP32-S3.I changed it to [this].

The size is about a quarter of the original, and the price has dropped from 849 pesos (2250 yen) to 340 pesos (900 yen).

The processing power of the ATmega2560 and the ESP32-S3 are worlds apart.

item ATmega2560 ESP32-S3
CPU 8-bit AVR 32-bit Xtensa LX7 Dual Core
clock 16MHz Maximum 240MHz
Number of cores 1 2
RAM 8KB 512KB SRAM
Pop 256KB Usually 4MB to 16MB
Floating-point numbers not good high speed
Wifi none Built-in
Bluetooth none BLE compatible
USB Basically none Built-in USB OTG
DMA none Yes
RTOS Basically none FreeRTOS standard

This is the analog mixer and VOX circuit I ordered from JLCPCB.
A circuit board to be mounted on top of the Mega2560.

The DFPlayer MP3 player for voice ID is mounted on the right side.
The RTC DS3231 module will be mounted on the left side.
The RTC is used to control the transmission timing of the voice ID and CW ID.
Despite its small size, the ESP32-S3 supports both Wi-Fi and Bluetooth.
I spent two days porting the software from the Mega2560 to the ESP32-S3.
Furthermore, the configuration programs I've created using Python up until now have been done via USB connection.
I made it so that you can connect via Wi-Fi and configure it from both your PC and smartphone.

I'm about to start designing the circuit board, and I'm planning to combine the analog board and the MCP digital board into a single board.
You can now configure repeater settings using your smartphone.

Wi-Fi can connect to existing networks or function as an access point.
May 3, 2026.   May 13, 2026.