01space / esp32-c3-0.42lcd Goto Github PK

Hiyah!

Both the NeoPixel and the OLED demos work, and I combined their declarations together to use both, just like the graphic/LED demo the board arrives with.

But when I run the script, I keep getting a "[ 93][W][Wire.cpp:204] begin(): Bus already started in Master Mode." and the ESP32 restarts!

I think the error means one of the includes is grabbing the I2C bus, so Wire can't use it? I don't know why.

#include <U8g2lib.h>
#include <Adafruit_NeoPixel.h>
#include <Wire.h>

#define LED_PIN 2
#define SDA_PIN 5
#define SCL_PIN 6

U8G2_SSD1306_72X40_ER_F_HW_I2C u8g2(U8G2_R0, /* reset=*/ U8X8_PIN_NONE);   // EastRising 0.42" OLED
Adafruit_NeoPixel led = Adafruit_NeoPixel(1, LED_PIN, NEO_GRB + NEO_KHZ800);

void setup(void) {
  Wire.begin(SDA_PIN, SCL_PIN);
  u8g2.begin();
  u8g2.clearBuffer();
  u8g2.drawStr( 1, 30, "01Space");
  u8g2.sendBuffer();
  led.begin();
  led.setBrightness(50);
  led.setPixelColor(0, 255, 0, 0);
  led.show();
  delay(334);
  led.setPixelColor(0, 0, 255, 0);
  led.show();
  delay(334);
  led.setPixelColor(0, 0, 0, 255);
  led.show();
  delay(334);
  led.clear();
  u8g2.clearBuffer();
  u8g2.sendBuffer();
}

void loop(void) {

}

I am trying to make a PCB footprint in KiCad and it would be a lot easier if a STEP file or DXF file was provided which had the exact locations of pin holes and PCB edges provided.

I have tested the bat pin… and min voltage to startup is providing 3.7 V… perfect for Lipos… I will be feeding 6V and want to know if the BAT pin will accept the 6V and regulate it?

Should I feed 6V to the BAT pin , 5V pin or 3V pin? Looking to maximize the 6V battery I will be using (2x 3V Coin Cells)

readme states: "Other settings see settings.png." - could not find any settings.png in the repo

Not having any luck with Serial.print(). Lots of info on the web, but nothing seems to work for me. How do I get Serial.print() to show in Arduino IDE?

There are two diodes in the schematic pdf-file and these are visible also in the images next to the B-button. But next to the ESP32-C3 chip there is a third diode (part with SJ on it) - I think - what is this diode for?

BAT pin is cool, but charge via BAT pin is coller

Arduino 1.8.15
Chip is ESP32-C3 (revision 3) 0.42 OLED
Espressif systems: https://github.com/espressif/arduino-esp32 (Version 2.0.4, also reverted to 2.0.3)

Running: WiFiWebClient.ino

The device isn't connecting to either of my two WiFi spots. I've tried it with my two little purple pcb units with the same result:
Both ESP32-C3 2.0.3 (as instructed on this github) and the current 2.0.4 both failed with the following:

Attempting to connect to SSID: Thelma
[  4623][D][WiFiGeneric.cpp:929] _eventCallback(): Arduino Event: 0 - WIFI_READY
[  4659][V][WiFiGeneric.cpp:338] _arduino_event_cb(): STA Started
[  4659][D][WiFiGeneric.cpp:929] _eventCallback(): Arduino Event: 2 - STA_START
[  4668][V][WiFiGeneric.cpp:97] set_esp_interface_ip(): Configuring Station static IP: 0.0.0.0, MASK: 0.0.0.0, GW: 0.0.0.0
.......[  8929][V][WiFiGeneric.cpp:360] _arduino_event_cb(): STA Disconnected: SSID: Thelma, BSSID: b0:7f:b9:85:9a:d7, Reason: 15
[  8930][D][WiFiGeneric.cpp:929] _eventCallback(): Arduino Event: 5 - STA_DISCONNECTED
[  8936][W][WiFiGeneric.cpp:950] _eventCallback(): Reason: 15 - 4WAY_HANDSHAKE_TIMEOUT

I googled a bit, and seen this issue crop up in the past on older chips - it seems to be something that's "returned" on the C3.
One site suggested:

     esptool --port COM21 erase_flash

C:\Users\sarah\AppData\Local\Arduino15\packages\esp32\tools\esptool_py\3.3.0>esptool --port COM21 erase_flash
esptool.py v3.3
Serial port COM21
Connecting...
Detecting chip type... ESP32-C3
Chip is ESP32-C3 (revision 3)
Features: Wi-Fi
Crystal is 40MHz
MAC: 84:f7:03:67:e0:60
Uploading stub...
Running stub...
Stub running...
Erasing flash (this may take a while)...
Chip erase completed successfully in 18.7s
Hard resetting via RTS pin...

It flashed, but it didn't work.

I've also walked up to the access point with the device - in case the signal strength was bad... no change.