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See viewtopic.php?p=107449#p107449 - where I posted an Arduino PW sine wave chart..

Might do what you need?

Martin

Just tried compiling and seems the PIC you have has too little RAM to use the component. I stripped everything out - apart from Read and Write of 10 bytes (no display etc) - and get an error insufficient memory to allocate _FCL_BUFF (130 bytes) - which would (space permitting) be used by the Page Re...

Delete the pullup macro too...

I also output the data to UART - change this to use your display instead ..

Will try when I get home this afternoon.

I have a few PICs I can try too?

Martin

Yes - if that's where they are connected. Adress should probably be 0 (pins 1 and two floating or gnd)

You'll need to change the i2c pins (and the eeprom address) in the component properties.

Also delete the macro pullup (and the two calls to it). You'll need to have pull-up resistors as per i2c.

Martin

I tried the official component - good to check you have comms first :-) After a little fiddling - using an Arduino Uno - and enabling the inbuild pull-ups (I also needed external pull-ups but it wouldn't work with either the enable or the hardware removed - very odd, but the resistors I used were ju...

Hi,

You look to be using i2c generic read/write register The eeprom needs more than this to work correctly. Have you tried the eeprom component?

Have a look at viewtopic.php?t=22422 for some more detail

Martin

Looking at the component source - and it it makes fairly heavy use of RAM. For example 6 'In' and 10 'Out' buffers of 20 bytes each and ScanNames at 100 bytes. Some might be optimised away by the compiler (?). It might be possible to modify it to a 'cut down' version - with less features and less me...

Tested with the WLAN component cut down to a minimum - no web pages, no substitutions. Adding an SSD1306 (height set as 8 ) - and the esp8266 just returns 'error'. Two UARTs also seems to be too much - I tested using a 32 byte string to hold (some of) the firmware version - and used 4800baud (9600 -...

A step forward... I managed to reflash the Wemos d1 mini. I managed to get the device to reply with the firmware version using an FTDI device. But - I think the problem is that the ATMega8 at least won't support the display (I tried an ssd1306 and set the display height to 16). I think it might be a...

Yes - stepping up to v10 (and a m328p) would be a good idea. Out of interest - I just recompiled using v8. It still 'works' in that the SendString still sends "AT+GMR" - but Initialise() just seems to send a newline. I'll have a bit more of a play getting an esp8266 flashed and see if I ca...

I can confirm that the MCU does write the appropriate data to the esp8266 using the component.. So initialise it writes AT+CIPMUX=0 I then wrote in a loop AT+GMR using the ESP8266::SendString macro. But - I tested with the FTDI convertor. I used hardware channel at 115200 (on 8MHz Atmega8 as before)...

Have just tested an ATMega8 UART and seems to work okay. Setup - I have the MCU on a breadboard connected to (and powered by) a programmer Reset pin 1 mosi 17 miso 18 sck 19 VCC (I have 5v) 7 Gnd 8 First I did a 'flash test' - using d0 and all is good. Then I hooked a FTDI converter to d0 and d1 (an...

What is displayed is correct... The control characters don't display.

Martin.

AT+GMR\r\n will just display as AT+GMR the \r\n are control characters and would do carriage return and new line (from the days of teletypes) and probably do nothing on the LCD display.

Martin

I have an atmega8 - I'll have a play with the UART component this evening - see if I can spot any issues?

Martin

The '\' character is an escape character so you need to follow it with something (in this case it escaping ') so if you want a backslash change it to '\\'

Martin

I think Iain meant to connect the Tx and Rx pins on the UART-TTL adapter rather than on the esp8266?

Martin

One way to do this is to multiply the value by 100 (for 2 decimal places) and assign to an integer...
Note that not all numbers can be represented exactly by fp variables.

Can I also suggest an upgrade to v10 it's free and v4 is now very old

Martin

If you want to 'download' a program - then you are limited to targets (for example the esp32) which can handle OTA updates. Don't expect it to be easy. It would also be possible on something like a Raspberry Pi - where your 'main program' could download new programs - and run them. If you are using ...

You need to shift and then add the shifted 'out' bit back in. so assuming 8 bit values (.x and .msb and .lsb) .msb = .x & 0x80 .x = (.x << 1) | (.msb != 0) // Or use (.msb >> 7) not sure which is quicker? Will do a left rotate - note you could probably cram it into one line and do without the ex...

Yes - I got a couple of batches at about that time and some worked and some not - hence the above thread... As a test - try running them using the Adafruit libraries and the Arduino IDE - if they work it's an initialisation problem (and I'd guess you'd be very unlucky to get 50 duff displays...) If ...

Yes, I think so.

There seem to be several variants which need slightly different startup sequences.

If you give me a pointer to the display you are using I'll see what I can do...

Once you have the initialisation correct the rest is fairly straightforward..

Martin

I think the issue might be one of timing, In the receiver - have an interrupt on CS change (it limits the choice of pins for this) - then attempt to receive the data. I don;t know whether it would be possible to receive in the interrupt handler (small number of bytes maybe? - depends if the receive ...