Category: Geen categorie

Mail server migration

After setting up the new mail server, the mail from the old server has to be migrated to the new server. I’ve done this before, and I have been looking through my old posts, here and on the old blog (andre.blaatschaap.be), but it seems I haven’t written about the procedure. Configure the mailbox on the…


Setting up a new mail server

I’ve been looking into configuring a new mail server. My old server is using ISPConfig. In my student days and some time after, I used to host websites for third parties, but I am no longer into that, so for the new server, I won’t be using ISPConfig. I’ll keep it simpler. Something like PostfixAdmin…


AT Commands, Querying Network Registration

Now I am playing with these GPRS modems, I’m also looking into how to communicate with them. Apart from the manufacturer’s manuals, I’ve also been looking at the standards for the AT commands, ETSI TS 127 007. It’s a huge document, and there are commands in there that make me think about the phones we…


GPRS Modules (part 2)

A while ago I wrote about GPRS Modules. The Neoway M590E kits, which came in 2018 for merely 89 cents from AliExpress. Those days are over, these days they come over for 3 euro something (including shipping) even though they become less and less useful as the 2G shutdown comes nearer and nearer. I want…


SPI Flash

As I mentioned in my Sub-GHz Radio Modules project, I’m adding an SPI flash to store some information about the module, like the type and frequency band, to allow for auto-detection of the proper parameters. As such, I decided to pick up an old, unfinished project, of interfacing with SPI Flash. More specifically, SPI NOR…


What is the time?

Another thing I had a look at are DCF77 modules from AliExpress. The DCF77 is a 77.5 kHz time signal transmitted from Mainflingen in Germany. At 60 kHz, the MSF time signal is transmitted at 60 kHz from Cumbria in the UK. This signal should also be receivable in the Netherlands. There are no modules…


GPRS Modules (part 1)

While I have been working on the radio modules. I wasn’t in the mood for more coding (or rather, analysing the magic values generated by WDS), so I made a next revision of the radio PMOD modules. Seems I overlooked the PCB thickness in the KiCad Calculator tool, and ended up with the wrong width…


Playing with some radio modules (part 5)

Last time I made the Si4432 communicate with the SX1231. This time I’ll take a look at its successor Si4463. While Si4432 implements a traditional register-style access, the Si4463 provides an “API”, which commands. There is a command to access properties, which are akin to registers, as-in you can set and get their values. At…


Playing with some radio modules (part 4)

In previous post of this series I have been comparing the specs of various Sub-GHz transceiver ICs. In this part, the goal is to let different transceiver ICs of different brands communicate. In this part, I will let a HopeRF RFM69 module, which appears a rebranded SemTech part, close to the SX1231H, communicate with a…


MH32F103 I²C issues

As discussed in previous posts comparing the 32F103 microcontrollers, there are several I²C issues on the MegaHunt MH32F103. Disclaimer: The parts are assumed to be MegaHunt MH32F103. I have been told the “STM32F103 China” Blue Pills from AliExpress contain a MegaHunt MH32F103. As these parts have been relabelled as STM parts, I cannot tell for…