I ordered 2 pieces of SI4432 module on January 15, 2017. It has been more than a month now and I haven't received the modules yet. Neither can I track my package as it says item not found on the tracking link. What did I pay for ?
Recieved this "Step-Down Converter" only to find that the adjustable value (displayed and real) are constrained to ranges above the input voltage, rendering it complete junk. Not sure if this is a practical joke, but a sure waste of money & time. Shipper took my order number to "check with the engineer", that was 3 weeks ago, no response.
Took almost three weeks to arrive from China. They hauled it to New York on its way to California... The bottom side had strange white powdery residue (partially dissolved heat transfer paste?) as well as solder flux from final assembly, which cleaned off nicely but shouldn't have been there at all. Once it looked good I wired it up and it worked perfectly. Really no documentation needed, everything is obvious. Easy to dial up exactly the voltage I need, to two decimal places.
Salut, I have got two of these modules plus OLED. My idea was to find out how these modules can communicate with themselves and other microcontrollers. Unfortunately there is no reasonable documentation available on how to use these modules. Just a bit of code to reverse engineer. [Update] After some investigation, I see a chance to deploy the optiboot bootloader and use it under the Arduino IDE or Atmel Studio. I will give it a try as it is still better than throwing it away. I will post my success or failure here. I will alos compare it to the DevDuino, a similar board but with a ATmega328 and optiboot loaded[/Update]
Product looks high quality and is compatible with other versions available at higher prices . I can verify it works well but did not run any official tests . If you can be ok with 2-3 week delivery times these motor drivers are a bargain