make programming reset pulse longer for esp8266 and add notes to readme

README.md

@@ -365,8 +365,21 @@ it starts the connection with the `?\r\n` synchronization sequence.
 
 (This is not well tested, more details forthcoming...)
 Yes, you can use esp-link running on one esp8266 module to flash another esp8266 module!
-For this to work you need a special version of esptool.py that has support for serial over
-telnet.
+The basic idea is to use some method to direct the esp8266 flash program to port 2323 of
+esp-link. Using port 2323 with the appropriate wiring will cause the esp8266's reset and 
+gpio0 pins to be toggled such that the chip enters the flash programming mode.
+
+One option for connecting the programmer with esp-link is to use my version of esptool.py
+at http://github.com/tve/esptool, which supports specifying a URL instead of a port. Thus
+instead of specifying something like `--port /dev/ttyUSB0` or `--port COM1` you specify
+`--port socket://esp-link.local:2323`. Important: the baud rate specified on the esptool.py
+command-line is irrelevant as the baud rate used by esp-link will be the one set in the
+uC console page. Fortunately the esp8266 bootloader does auto-baud detection. (Setting the
+baud rate to 115200 is recommended.)
+
+Another option is to use a serial-to-tcp port forwarding driver and point that to port 2323
+of esp-link. On windows users have reported success with
+[HW Virtual Serial Port](http://www.hw-group.com/products/hw_vsp/hw_vsp2_en.html)
 
 Debug log
 ---------

esp-link/cgiwifi.c

@@ -113,7 +113,7 @@ wifiAddStateChangeCb(WifiStateChangeCb cb) {
   DBG("WIFI: max state change cb count exceeded\n");
 }
 
-static bool mdns_started = true;
+static bool mdns_started = false;
 static struct mdns_info mdns_info;
 
 // cannot allocate the info struct on the stack, it crashes!
@@ -126,7 +126,6 @@ void wifiStartMDNS(struct ip_addr ip) {
     mdns_info.server_port = 80,     // service port
     mdns_info.ipAddr = ip.addr,
     espconn_mdns_init(&mdns_info);
-    espconn_mdns_enable();
     mdns_started = true;
   }
 }

serial/serbridge.c

@@ -211,7 +211,7 @@ serbridgeRecvCb(void *arg, char *data, unsigned short len)
     if (mcu_reset_pin >= 0) GPIO_OUTPUT_SET(mcu_reset_pin, 0);
     os_delay_us(100L);
     if (mcu_isp_pin >= 0) GPIO_OUTPUT_SET(mcu_isp_pin, 0);
-    os_delay_us(100L);
+    os_delay_us(2000L);
     if (mcu_reset_pin >= 0) GPIO_OUTPUT_SET(mcu_reset_pin, 1);
     //os_delay_us(100L);
     //if (mcu_isp_pin >= 0) GPIO_OUTPUT_SET(mcu_isp_pin, 1);