https://github.com/elehobica/pico_jjy_tx

JJY transmitter for Raspberry Pi Pico W
https://github.com/elehobica/pico_jjy_tx

jjy micropython raspberry-pi-pico-w

Last synced: 3 months ago
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JJY transmitter for Raspberry Pi Pico W

• Host: GitHub
• URL: https://github.com/elehobica/pico_jjy_tx
• Owner: elehobica
• License: gpl-3.0
• Created: 2023-05-20T00:16:28.000Z (over 1 year ago)
• Default Branch: main
• Last Pushed: 2024-03-08T13:10:33.000Z (8 months ago)
• Last Synced: 2024-04-22T12:33:31.254Z (7 months ago)
• Topics: jjy, micropython, raspberry-pi-pico-w
• Language: Python
• Homepage:
• Size: 629 KB
• Stars: 3
• Watchers: 1
• Forks: 1
• Open Issues: 0
• Metadata Files:
  • Readme: README.md
  • License: LICENSE

Awesome Lists containing this project

• awesome-micropython - pico_jjy_tx - JJY transmitter for Raspberry Pi Pico W. (Libraries / Communications)

README

        
# JJY transmitter for Raspberry Pi Pico W

## Overview

This project is JJY transmitter for Raspberry Pi Pico W in proximate usage

This project supports:

* Fetch JST time by NTP

* Generate JJY signal

* JJY carrier frequency is configurable for 40 KHz or 60 KHz

About JJY, please refer to [https://jjy.nict.go.jp/jjy/trans/index.html](https://jjy.nict.go.jp/jjy/trans/index.html)

## Supported Board

* Raspberry Pi Pico W

## Pin Assignment

| Pico Pin # | Pin Name | Function | Note |

----|----|----|----

|  3 | GND | GND | Ground |

|  4 | GP2 | PIN_MOD_P | JJY modulation differential output Pch |

|  5 | GP3 | PIN_MOD_N | JJY modulation differential output Nch |

|  6 | GP4 | PIN_CTRL | Control Output (option for external carrier generator) |

* If single-ended output is required, use GP2 and GND.

## Connection Diagram

![Connection Diagram](doc/pico_jjy_tx_connection.png)

## How to make the program work

* Use [Thonny](https://thonny.org/) or similar MicroPython IDE (Confirmed with Thonny 4.0.2, Python 3.10.9)

* Install MicroPython (Raspberry Pi Pico) interpreter firmware on Raspberry Pi Pico W by Thonny

* Confirmed with MicroPython v1.22.2

* Add `secrets.py` to include your WiFi configuration and put it on the storage of Raspberry Pi Pico W

```

# secrets.py

secrets = {

  'ssid': 'xxxx',

  'password': 'xxxx',

}

```

* Excecute `pico_jjy_tx.py` from Thonny

* For stand-alone application, please rename `pico_jjy_tx.py` as `main.py` and store in the storage of Raspberry Pi Pico W

## Tips for emitting JJY

* The easiest way to make the clock detect JJY emulated singal in small room environment, is just to connect wired earphone between PIN_MOD_P and PIN_MOD_N pins and put the clock near the earphone cable. (This could damage the earphone. please try with cheaper one.)

* For the more proper way, round ferrite rod bar antenna with appropriate driver would be suitable.