Getting on with my ESP32 based Wifi/Ethernet Hat. First draft of schematics below. This is the first time I try LAN8710 so all bets off. I am most worried about the 100Mhz signals here. The next picture show components before I place and route the PCB. This looks tight tbh. LANEnable will switch power on/off…
I decided that I want to make 2 different Ethernet/Wifi modules With different purpose. With Raspberry PI it will be 3, but RPI and ESP32 overlap in functionality. ESP32 with Ethernet/Wifi/Bluetooth is a very attractive “Connector” solution where I can add more connections by adding multiple Hat’s. I can sadly only add a single Raspberry…
This early draft uses ESP32 and a HR911105A RJ45 connector. I want to attempt using LAN8720A as Phy. The Hat will contain SPI as backbone, CAN as secondary control, an USB, Wifi, Bluetooth and Ethernet. The schematics look straight forward, but I have a lot of reading up to do. ESP32 is as fast as…
I am as mentioned before looking for alternatives to connect to Wifi/Ethernet that don’t include a SD Card or going outside the Hat format. I also have an interest in making Ethernet available from embedded systems in general. The main reason is however to be able to Connect multiple Ethernet/Wifi Connections. The block diagram above…
I just received HLP-7688A module and looking at the size I must admit that I tempted to create a Switch/Router in Hat format. I am not os sure about the SPI on this, but it has 2 UART’s, so assuming I can control the code on the Linux module this could be interesting with Wifi…
This illustrates the BasicPI Firmware Stack in progress. What I always do in embedded applications is to make a “standard” main.cpp as follows: void AppInit() { // wire hardware } int main() { AppInit(); // start OS } A team I worked in years ago agreed on this standard so we should…
The most obvious Hat to use HLK-7688A on is a Ethernet Switch or Router with SPI backbone support. I have ordered a dev unit so I can test out this possibility. The Ethernet switch part is very straight forward, I also see a very decent SPI, but I need to dig a bit more into…
Replaced ESP32 on the failing Hat and Wifi worked. Seems like I had my first ever failing ESP32 module. The Wifi Hat is No 2 from top. This stack includes (from top): 7 x Stepper Hat ESP32 Based Wifi Hat XPortHub XPortHub Raspberry PI 3A+ I have 2 USB ports connected here and both show…
This ESP32 Hat work perfect on IO, but as I switch on Wifi it short-cut and reboot. I might have encountered my first bad ESP32 module, but I am not sure yet. I need to assemble another unit and see if this works as this is the first time I assemble this board. This is…