The ethernet modules have already been delivered and are ready to be mounted on the new ordered PCB’s. Those new PCB’s will probably be delivered within a day of 8-ish. So please be patience, there will be 100 on stock soon.
Another batch of 600 has been ordered around 6th of July. With a bit of luck they’ll be ready within two weeks and than another day of 5 for shipping.
SlimmeLezer WiFi ESP32
I was experimenting with an ESP32-C3 begin 2022, yet the ESPHome code I couldn’t get properly working (I got it working, but not userfriendly to connect to your network). I soon realized that it probably was made too soon and has to be on hold until ESPHome is ready.
Therefore I made another prototype with the default ESP32-WROOM-32D. This one is fully compatible the way the “old” versions is working (the ESP12F). I even managed to squeeze it all on the same footprint as the regular version. So it fits in the current case as well. Now this ESP32 is a bit more expensive than the ESP12F, and I’m not sure if it’s worth the extra money in comparison to the functions.
The ESP12F is simple, cheap and does what it must do: send data from serial to wifi. Besides ESPHome, it also works with esp-link, for platforms that doesnt work with ESPHome. I haven’t found a working esp-link for either ESP32 or ESP32C3.
I wanted to use Improv via serial, yet that doesn’t work with the DSMR component. Improv requires a baud_rate higher than 0 under logger, while DSMR requires a baud_rate of 0 to work in hardware serial instead of software serial (see issue GitHub).
Using an ESP32 makes that possible, yet it draws more power (which probably can be tuned within ESPHome). It also makes it possible to use Improv via BLE (haven’t played with that yet).
So if there’s a demand/interest for this one, I could consider order it in larger batches, for now I’ve got about 15 as prototype (not sell worthy, unless you want to tinker with it).
New ESP32-based SlimmeLezer eth/wifi
An older prototype which I have since begin 2022, is a Wireless Tag WT32-ETH01 based reader. These developboards are sold for around €15 on AliExpress or on Tinytronics. It’s an add-on board with integrated USB-serial to flash it (no usb on the developboard) and a P1 connector with inverter.
Because of the cost of those board, I might consider in only selling the custom PCB and you need to get a WT32-ETH01 yourself. I’ve looked in buying it in a large batch of 100 and that only saves you about €2~€3 and therefore not worth it in buying it large with a risk of not selling it.
It works without an external power source direct on my DSMR 5 test meter via ethernet. Via WiFi draws more power and I havent found the most stable setting yet.
This one is in my opinion the best solution for meters with encrypted data like in Luxembourg and Austria.
Another option is to add extra connectors for a water meter or solar panels (pulse counters). There’s some room left and I’m looking into that too.
I wonder what your thoughts are on these new prototypes 🙂