I pulled mine apart to try to see if there was a label that would provide a clue about which version to write it it - there isn't. A tip: you can just undo the top screws front and back to get the lid off. Watch the speaker connected by short wires
On power on, it displayed V1.1.5 of the library by PU2CLR. After upgrade it now shows 3.04.
I followed the instructions on swling.com but used Arduino 1.8.13 on macOS just fine.
Basically the steps are:
- Select Arduino Nano
- Select ATMega 328P (Old boot loader)
- Install libraries:
- SI4735
- Tiny4kOLED
- TinyOLED-Fonts (it's a dependent)
The source code is available here. For my hardware, I found the version titled "SI473X_ALL_IN_ONE_OLED_RDS_CHINESE_V3" was the one that matched the buttons on my front panel.
In the source code of the sketch there are some settings to adjust if you like such as default volume.
Before upgrade here's the splash screen:
It's quite a sensitive receiver and sideband works pretty well. Here's an example.
3 comments:
It's interesting how the received audio drops when you increment the VFO. Any ideas why this might be happening?
Question: Is there a short description of what the display is showing?
Example: Last or bottom line of the display shows:
BW:4KHz. 45. S:3 100%
Understand the BW, & 45. What does the S:3 mean? What does the 100% mean?
Thanks in Advance,
Tom
tom@tomgoss.us & ddd8130dr@gmail.com
Hi Tom,
I think the firmware is based on this repository: https://github.com/pu2clr/SI4735/tree/master/examples/SI47XX_03_OLED_I2C
BW is bandwidth.
S:3 is signal strength in a logarithmic scale.
Not sure about 100%, I'll have a play and get back to you.
73
Peter
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