HowTo: PCB – Assembly of the Anemosens_MCU PCB

With the Aenmosens_MCU board it is possible to use Anemosens as a stand-alone anemometer, which can be used for long-term observations in remote areas (hence the microSD card slot) or as a further part of your weather station (hence the RS485 interface).

The RS485 interface is used to provide the measured data via Modbus. In this way you can easily connect the anemometer to your RaspberryPi, PC or many other platforms that support RS485 or Modbus.

In addition, a serial stream of data (packaged as a handy JSON) can be activated via the USB connection.

And last but not least, the built-in ESP32 also starts a BLE server. This also gives you the option of calling up the data wirelessly with your smartphone or computer.

Of course, you can also write your own firmware and program it via the integrated USB-C port. The QWIIC port enables additional sensors to be connected easily via I2C.

I had the circuit board manufactured by the circuit board manufacturer , who made it available to me free of charge. At this point, thank you again for the great service and cooperation. 🙂

In the following you can see a few pictures of the fully assembled circuit board and (almost) all possible components. Unfortunately, due to the current shortage of chips, some sensors such as the BME280 are very expensive or poorly available, which is why I did not install it.

You can also see more information about Anemosens in the following video.

Safety instructions

I know the following hints are always a bit annoying and seem unnecessary. But unfortunately, many people who knew it "better" from carelessness lost their eyes, fingers or other things or hurt themselves. In comparison, a loss of data is almost not worth mentioning, but even these can be really annoying. Therefore, please take five minutes to read the safety instructions. Even the coolest project is worth no injury or other annoyance.

Affiliate links / advertising links

The links to online shops listed here are so-called affiliate links. If you click on such an affiliate link and shop via this link, receives a commission from the online shop or provider concerned. The price doesn't change for you. If you do your purchases via these links, you will support in being able to offer further useful projects in the future. 🙂


For the construction you have to master SMD soldering tasks. The following articles provide tips on how to do this.

Required tools:

PCB manufacturing: You can find all the information you need to manufacture PCBs here:

The Assembly

In previous projects I inserted individual pictures at this point showing which components have to be soldered where on the PCB.

An even better way to get an overview of which components belong where on the PCB can be seen in the following paragraph. Thanks to the work of the Open Scope Project , you can now generate very helpful HTML files in which you can see directly which components have to be installed where on the PCB.

You can see the overview for the Anemosens sensor PCB here: Anemosens_MCU PCB

The current file can also be found in the GIT repository under the following link:
(Please note that you have to download the HTML file in order to display it. This is not possible directly from the GIT repository.)

Programming firmware

The firmware for controlling the sensors on the Anemosens sensor PCB in combination with the Anemosens_MCU PCB is still under development. You can download the current status from the GIT-Repository . You can find the firmware under the following link.

I hope everything worked as described. If not or you have any other questions or suggestions, please let me know in the comments. Also, ideas for new projects are always welcome. 🙂


P.S. Many of these projects - especially the hardware projects - cost a lot of time and money. Of course I do this because I enjoy it, but if you appreciate it that I share these information with you, I would be happy about a small donation to the coffee box. 🙂

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