Software Serial Esp8266 Sdk
Hey everyone, I am still working with the ESP32 from the last box as I am still waiting on box 0016 to arrive. I am trying to add a GPS module to my circuit to try and pass real-time location to the api instead of hard coding it into the weather widget (really just trying to get the GPS portion working right now, not so much the integration into the weather widget yet).I found a software serial library designed for the esp32/arduino , but I am getting an error on compilation. The error is: 'C:UsersUserDocumentslibrariesespsoftwareserial-masterSoftwareSerial.cpp:27:18: fatal error: gpio.h: No such file or directory'So it looks like the IDE is looking for the gpio.h file but can't find it. Do I need to re-install the ESP32/Arduino files or something? I'm trying to do the software serial because I plan to add a few other portions into the project, and I have heard that the GPS module has issues using the hardware serial interface while other things are going on.
ESP8266 with Arduino - Trials and Errors. Apr 13, 2017. Hardware. pyliaorachel. Similarly, you interact via the serial monitor with your ESP8266 with a set of AT commands available. Simple, isn't it? Instead of guiding you through how to send the various AT commands. Download the latest ESP8266 SDK. The AT+GMR command tells the ESP8266 to report what version of the AT command set it contains, what SDK (Software Development Kit) has been loaded on it, what company built the ESP module, and when the SDK was loaded on the module. Finally, as usual, the ESP8266 concludes its transmission with OK. ESP8266 ESP-01 Serial WIFI Wireless.
Any ideas?. As an update. Still looking into getting a better solution for the above, but I have changes that are slightly better than some of the quick hacks above!
I ended up creating a fork of the 8266 library and have just been making modifications trying to get a GPS module wired up to the ESP32 Dev Board using the Software Serial library. Fork found here:Changes are still ongoing, I did figure out some useful tidbits that I wanted to share. The ICACHEFLASH ICACHEROMATTR defines that the 8266 uses were moved to a more aptly named IRAMATTR in the ESP32 Arduino core:. Interesting thing is that the wpa2 files in the ESP32 Arduino core still reference the ICACHERAMATTR values in the esp32 library.
Might be something fun to checkout why that is, but changing the ICACHERAMATT values over to IRAMATTR values produces our desired results and tosses the program code into IRAM instead of flash.The W1TCADDRESS is still not found in the esp32 core from what I can see, but there is something relating to that called GPIO.statusw1tc in that might work for us? To be honest that one I need a lot more research on, since I really have to figure out what exactly that is doing unless anyone knows?Then other than those that I saw yesterday, the old 8266 library looked like it only supported 16 GPIO pins whereas the new ESP32 seems to have 36. In my fork I updated it a little bit to allow for the larger GPIO pin count, but I still need to look into that to see what pins are not allowed and filter it out similar to the 8266 library.Anyway that is what I have! Hopefully it is something to checkout and might help you.
Still working through changes on the fork so feel free to watch that. Changes should come through as I get some time to work through the issues myself. Update - I was able to merge everything into one.ino file and it is working great. A little buggy if it doesn't pick up a GPS signal right away, but usually after a reset it starts right up and does what it is designed to do.I'll post some pictures and the code tomorrow after I ref the source code, etc.
Basically I modified the weather widget to pull the current weather from the GPS coordinates instead of hard coding the city/state. I also added a 16x2 LCD to display current geo coords and additional info while booting.
I made use of three separate hackerboxes for this project, the only part that I added from outside the hackerboxes was a 10k pot. Finally finished the code. Added a if/else section to loop and wait for a GPS signal before moving on and getting a whole bunch of errors. Now the project will report no GPS signal and then retry until you have a lock. Once locked, that location will be inserted into the URL to get the current weather for that location. Still not quite sure how to add images and files here on Reddit, but I made a comment on the site that has images and a zip file containing the required libraries/files to compile and run the program. Funny thing is I ended up not needing the SoftwareSerial in the first place.
Software Serial Esp8266 Sdk 10
Go figure.
Software Serial Esp8266 Sdk 3
The REPL doesn't start if you put something in startup scripts (main.py) to do something else instead.What do you put in main.py to do something else to disable REPL??I am an application end user still learning python, can someone please provide a step by step guide/workaround on how to implement some sort of usable UART functionality. If it requires a hardware mod and if and how to disable REPL?UART port on ESP8266 is implemented for most of the other language ports, LUA, Arduino, javascript and even ESPBasic that also has a second software UART implementation. I still don't understand why no priority has been given to implementing formal UART functionality in ESPmicropython. Writing a software UART is a nontrivial task.
There are many parameters to accommodate, and timing needs to be quite precise (+-5% or thereabouts) so receive and transmit would need to be interrupt driven. To add to the complexity it needs to be able concurrently to send and receive. The first step is probably to characterise the ESP to determine timing precision, bit-banging in response to an interrupt. This would give a pointer to the likely maximum baud rate.An interesting project, but if anyone takes it on they won't have it done in a day.