forum.pistar.uk

Hi, could you send the ebay link?
I just want to compare it with mine.
I also had an older firmware, but it upgraded just fine.

Cheers
Chris

If you are using the pi-star image it should not require you to enable the I2C, it should already be done by the os of that image.

Maybe you just have a bad OLED.

Can you test it with an arduino or with rpi by itself without the hotspot hat?
I would suggest and arduino as there already is code ...

Some OLED displays have SCL and SDA switched. Have you checked the pins on the display to see if they match the holes/pins on the Zumspot?

The tx/rx frequencies are spaced 5mhz on the UHF band so they should be far apart enough not to create any reciprocal interference.
In fact, I have been monitoring activity with a separate radio and there is no interference that affects the hotspot or the radio.

Do you have the same type of duplex ...

I have replaced the original antennas with 2 Nagoya NA-771 and the hotspot is indoor.
I get about 1/4 mi in range in a hilly area.

I have never tried with an external antenna.

Sounds like you might have some other setup issues.
I did not have to change anything but the antennas.

WIN_jumbospot ...

Hi I have a duplex too. I don't remember which one stays on or off, but it should easy enough to test with a dummy load and an antenna.
I had it working simplex once, but I have switched back to duplex.

What are you trying to do?

By the way, I have found it very hard to get any answers out of this ...

Thank you, that starts clearing some confusion.

I found this cryptic message on the Retevis blog:

Q: "Is there a way to program a frequency into this radio that’s known to be DMRand decode the color code and time slot?"
R: Yes, Program two channels one with each time slot, Make sure you set the ...

Hi, the settings I am referring to on the HD1 are not the simplex/repeater commonly used in analog.
These are specific to the DMR settings only.
They do not affect the frequency settings and they are only avsilable to the digital channels settings.

Looks like I am having trouble explaining the ...

Yes, I do understand the concept of simplex and repeater very well, no novice there, thank you.

This is a DMR mode issue. The HD1 also uses tx and rx entries separately, or by shift if needed in analog.

My point and question is: why dies a cheap chinese radio communicate with repeaters and simplex ...

Well, I think I might have found the culprit.

While looking for a tx offset setting, I found out the Ailunce HD1 does not have one, but it has a "repeater mode" setting.
In other words, for some reasons, the channel programmed for communication for a repeater must be set in "repeater mode".

I used ...