Search found 39 matches

by gailu
Tue Dec 12, 2017 3:52 pm
Forum: ESP8266 SDK
Topic: UART0 RTC/CTS not working
Replies: 0
Views: 19

UART0 RTC/CTS not working

Hi Experts, We are interfacing modem (SIM800) with UART0 of ESP-12F. We are getting Rx Overflow in UART Driver when 656 bytes are received from modem. We are trying to solve proble with RTS/CTS and made following connection as RTS/CTS line in UART Driver are GPIO15 and GPIO13 GPIO15 (RTS) ----------...
by gailu
Sat Oct 14, 2017 3:47 am
Forum: ESP8266 SDK
Topic: UART0 Receive Overflow [RX OVF!!]
Replies: 2
Views: 232

Re: UART0 Receive Overflow [RX OVF!!]

We checked uart.c and found 100 bytes threshold set with following code WRITE_PERI_REG(UART_CONF1(uart_no), ((100 & UART_RXFIFO_FULL_THRHD) << UART_RXFIFO_FULL_THRHD_S) | Can you please let me know what is the maximum threshold we can set? What is the maximum size of UART0 RXFIFO?
by gailu
Thu Oct 12, 2017 6:03 pm
Forum: ESP8266 SDK
Topic: UART0 Receive Overflow [RX OVF!!]
Replies: 2
Views: 232

UART0 Receive Overflow [RX OVF!!]

Hi Expressif Team, We are communicating with server through modem connected to esp8266 over UART0. When our server sends a message [256] bytes, We get UART Rx overflow and message RX OVF!! is printed on console that is coming from uart.c We have increased following defines in uart.h as the maximum s...
by gailu
Thu Oct 12, 2017 2:31 am
Forum: ESP8266 SDK
Topic: UART Tx Buffer Messed up between UART0 and UART1
Replies: 2
Views: 294

Re: UART Tx Buffer Messed up between UART0 and UART1

It turned out to be a bug in my code. Sorry for inconvenience. In one of the code leg buffer was freed which later allocated to os_printf rightly.
by gailu
Thu Oct 12, 2017 2:09 am
Forum: ESP8266 SDK
Topic: UART Tx Buffer Messed up between UART0 and UART1
Replies: 2
Views: 294

Re: UART Tx Buffer Messed up between UART0 and UART1

A further debugging revealed my buffer gets corrupted even before tx_buff_enq. Corruption is caused by a call to os_printf. I have buffer allocated by os_malloc(). I copy the data in to buffer. When print data with a os_printf call, I see that it is corrupted by os_printf os_printf("Transmittin...
by gailu
Wed Oct 11, 2017 7:30 pm
Forum: ESP8266 SDK
Topic: UART Tx Buffer Messed up between UART0 and UART1
Replies: 2
Views: 294

UART Tx Buffer Messed up between UART0 and UART1

Hi Expressif Team, We are trying to use UART0 for logging (os_printf) and UART1 to communicate with other serial device. We have observed that when we send data over UART1 when os_printf is outputting data on UART0 messages through os_printf are also going on UART1. We are using tx_buff_enq() api to...
by gailu
Wed Aug 09, 2017 7:38 pm
Forum: ESP8266 SDK
Topic: Image built at QIO but programmed as DIO (ESP12-F not compatible ESP-12E)
Replies: 5
Views: 880

Re: Image built at QIO but programmed as DIO (ESP12-F not compatible ESP-12E)

We also have ESP-12F (labelled AI-Thinker) purchased in India from eBay.in in which QIO mode works. But we also have ESP-12F purchased directly from AI-Thinker imported in July second week where QIO mode doesn't work.
by gailu
Tue Aug 08, 2017 12:27 pm
Forum: ESP8266 SDK
Topic: Image built at QIO but programmed as DIO (ESP12-F not compatible ESP-12E)
Replies: 5
Views: 880

Re: Image built at QIO but programmed as DIO (ESP12-F not compatible ESP-12E)

We have purchased directly from AI-Thinker. Their sales rep email Id is on aithinker.com domain. We can send you a sample of ESP-12F if required.Payment is done to Bank Account in the name of Shenzen AI-Thinker Co. Ltd. I expect genuine module from them. Are you sure that they have not changed flash...
by gailu
Thu Aug 03, 2017 10:37 pm
Forum: ESP8266 SDK
Topic: Image built at QIO but programmed as DIO (ESP12-F not compatible ESP-12E)
Replies: 5
Views: 880

Image built at QIO but programmed as DIO (ESP12-F not compatible ESP-12E)

Hi Experts, We are using ESP in production. Our thousands of devices already deployed in field and having ESP-12E. We have purchased new 1000 pcs of ESP-12F from AI-Thinker two weeks back because their sales person confirmed us that ESP-12F is backward compatible with ESP-12E. However our testing sh...
by gailu
Fri Jun 02, 2017 9:59 pm
Forum: ESP8266 SDK
Topic: I2C Communication Fails with DS3231 RTC Module
Replies: 15
Views: 1858

I2C Communication Fails with DS3231 RTC Module

Hi Experts, Setup: SDK version 2.0.0 Hardware: ESP-12E I have connected DS3231 RTC module http://www.ebay.in/itm/252641600523 with ESP-12E as follows ESP-VCC -> DS3231-VCC ESP-GND -> DS3231-GND ESP-GPIO2 -> DS3231-SDA ESP-GPIO14 -> DS3231-SCL I hope my connections are correct as per i2c_master.h #de...

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