We have been working on a single cell Arduino compatible LoRaWAN low power node for some time now. Many who has been following our work has been asking when will the board will be released. We have to admit this is probably one of the simplest board we have ever design but the testing and validation (whether it’s in the lab or in the real world in sub zero temperature) requires so much of attention and patience. We’ll be talking a bit on the ideas behind this board and what motivates us to perfect it in this article. Read more

We made a quick update on the Mini Ultra Pro design. Here are the changes on V3: Read more

Our Reflow Oven Controller Shield has been around for many years now. It went through minor changes over the years and we were fortunate to ship out a lot of them. But, we always felt that we are not doing enough in pushing the overall cost further down to provide a lower entry to get into SMD reflowing. The need for an external Arduino board as the brain for the setup adds a massive cost to the shield (depending on whether you buy an official board from Arduino or a copy online). The new Tiny Reflow Controller is a derivative design from the shield version to address those tiny little issues. Read more

Few months back, a customer of ours asked whether we could get a shielded version of the HopeRF’s RFM95W on our Mini Ultra Pro boards. And sure we asked HopeRF whether they are willing to provide a custom version with a metal shield. They gave us a quotation and a minimum order quantity (MOQ) to fulfilled. Unfortunately, the MOQ were too high for either of us. So, we went on to search high and low for a LoRa SX1276 based module with a shield. At first we stumbled upon NiceRF’s LORA1276-100mW but it doesn’t have the same form factor as the RFM95W. But, we went on and made a prototype board with it. On paper it looks great but as soon as we assembled the very first few units using our reflow oven, we notice that one side of the module would be slightly lifted due to the imbalance of the module pinout (it has 12 pads on 1 side and another 2 pads on the opposite side corner of the module). The solder tension on the side with 12 pads are stronger compare to the other side of the module. We believe that this will somehow create some potential issues in manufacturing. So, we dropped the plan. Read more

When we first release the V1 of the Mini Ultra Pro, we were very surprised that people actually like the design very much. On top of that, we received a lot of suggestions on future features from our awesome customers. We take all the suggestions seriously and incorporate most of them into the new revision of the Mini Ultra Pro. Here’s the list of the changes in the new revision. Read more