11 thoughts on “WeMos D1 R32 ESP32”

1. Hello,
   Thank you for your contribution. From many years of experience with Arduino, the design of the D1 R32 appealed to me and I have also bought one.
   I am very disappointed with the range of the WLAN and Bluetooth modules. With both, I have to be right next to the router or stand with the smartphone in front of the ESP for it to connect. Do you have any tips on how to increase the range of the D1 R32? Thanks!

   Reply

   1. Hello Jonas,

      I've taken my D1 R32 out of the box. For me, the access point is on the ceiling and about 10m away.
      I have -56 dbm reception despite walls. With the addon board mounted, I still have -60 dbm. So, I can't complain about the range.
      However, the ESP's antenna also points upwards. Therefore, I turned the ESP upside down for this, which is mounted on a metal plate which should also provide additional shielding.
      The RSSI value on the ESP was -70 dbm, which is still okay.
      (Access point is a Netlink EAP265 HD)

      With the ESP32, there's an issue where it sometimes won't connect; this is described in the Problems chapter here: https://www.fambach.net/esp32-nuetzliche-infos/.
      Additionally, you can include an ESP.restart(); after the loop has run multiple times.

      Otherwise, that's all I can think of. https://www.youtube.com/watch?v=wP9YMNj_E7Y 😉
      Hello
      Stefan

      Reply

   2. Addendum, I've uploaded my test program to Git:
      https://github.com/sfambach/esp32/tree/master/project/Test_WifiEsp32

      Reply

   3. Hello Jonas,
      As a new user (well, until yesterday!) I was also struggling with an extremely weak Wi-Fi signal. My mistake was using pins from ADC2. I used GPIO2 & GPIO4 as I2C SDA & SDC. After switching to GPIO18 & 19, the Wi-Fi signal had full strength. Greetings from Austria, Bert

      Reply

      1. Hello Angelbert,

         Thank you for your contribution and feedback. It's a bit of a design flaw with the ADC2, but of course, that's due to the ESP32 and not the board.

         Greetings from Germany to Austria
         Stefan

         Reply

2. Thank you very much for this very informative article!

   I realise that most existing expansion boards won't work. However, this board is very easy to combine with the Arduino prototyping boards available from well-known suppliers in China for around 1 to 2 Euros. This makes it much easier to work with than wobbly breadboards.

   Greetings
   Fred

   Reply

   1. Hello Fred,
      Thank you for your contribution. You are of course correct, the prototype board fits and offers some advantages, I also like using it. I've also thought of the sensor board; for example, it offers direct connections for servos and other sensors.

      Link to quick Ali

      Hello
      Stefan

      Reply

3. Thank you for updating the page and for your reply. I suppose I'll *have* to get one of those then... 😉
   Kind regards,
   Migusch

   Reply

   1. Hello Migusch,

      if that works for you. Personally, I don't think the board is that good because most expansion boards don't work, making the format pointless. There are cheaper ESP32 boards with more pins that can also be programmed with the Arduino GUI.
      Hello
      SteFam

      Reply

4. Hello Migusch,

   Thank you for your contribution. My response took a moment, as I wanted to update the post and correct a few errors first. As the articles are constantly evolving, it's unfortunately sometimes unavoidable that some information is incomplete or the post, as in the case above, is forgotten. I hope the content is no longer contradictory now. The Arduino Uno has 6 ADC inputs, which are also conditionally available here. ADC Pins 0/1, however, cannot be operated in parallel with Wi-Fi. 4 further inputs of ADC 2 are available on digital pins of the Arduino Uno.
   I also tested the basic OTA straight away, it works even though I sometimes have interruptions.

   Regards, SteFam

   Reply

5. Lovely website with lots of useful information!
   Yes, the WeMos D1 R32 can be programmed wirelessly via „OTA“ (Over-the-Air).
   I didn't understand how many analogue connections can actually be used now. The chip could actually have 18, but how many are brought out to the Arduino GPIO? The silkscreen printing labels 6 connections as „Analog“. Above, you draw a line between A2 and A4, does that mean the connections are unusable?
   Thank you for your reply

   Reply