DOS/MTCP doesnt recognize the esp8266-slip-router

[guidol70]

As initial test I configured DOS/MTCP to use slip/etherslp - which did work fine with the following config:

DOS
CONFIG.BAT

SET MTCPCFG=C:\MTCP\MTCP.CFG
SET MTCPSLIP=TRUE
ETHERSL 0x60 4 0x3f8 115200

MTCP.CFG

HOSTNAME dellfx
PACKETINT 0x60
IPADDR 192.168.6.40
NETMASK 255.255.255.0
GATEWAY 192.168.6.41
NAMESERVER 8.8.8.8
MTU 1500

on the Linux/armbian-Side

stty -F /dev/ttyUSB0 -clocal -crtscts 115200
slattach -d -v -L -m -p slip -s 115200 /dev/ttyUSB0 &
ifconfig sl0 192.168.6.41 pointopoint 192.168.6.40 mtu 1500 up
arp -s 192.168.6.40 02:42:4c:aa:1b:68 pub
echo 1 >/proc/sys/net/ipv4/ip_forward

Then I flashed the ESP8266-SLIP-Router successfully with the
NodeMCU Flasher

Then I did connect to the slip-router via the follwing commands:

stty -F /dev/ttyUSB0 -clocal -crtscts 115200
slattach -d -v -L -m -p slip -s 115200 /dev/ttyUSB0 &
ifconfig sl0 192.168.240.2 pointopoint 192.168.240.1 mtu 1500 up
arp -s 192.168.240.1 02:81:5b:0c:5e:1b pub
echo 1 >/proc/sys/net/ipv4/ip_forward
telnet 192.168.240.1 7777

The show command did work, so I did reconfigure the configuration:
CMD>

set ssid Masallah_TT
set password MyPassword
set addr 192.168.6.40
set addr_peer 192.168.6.41
set use_ap 0
save
reset

On another armbian-system I did connect successfully to the slip-router via the commands:

stty -F /dev/ttyUSB0 -clocal -crtscts 115200
slattach -d -v -L -m -p slip -s 115200 /dev/ttyUSB0 &
ifconfig sl0 192.168.6.41 pointopoint 192.168.6.40 mtu 1500 up
arp -s 192.168.6.40 02:81:5b:0c:5e:1b pub
echo 1 >/proc/sys/net/ipv4/ip_forward
telnet 192.168.6.40 7777

And the "show" command does show my configuration fine:

CMD>show
ESP SLIP Router V1.1.1 (build: Sun Feb 23 23:34:52 2020)
SLIP: IP: 192.168.6.40 PeerIP: 192.168.6.41
STA: SSID: Masallah_TT PW: MyPassword [AutoConnect:1]
External IP: 192.168.6.82
DNS server: 8.8.8.8
Clock speed: 160
Serial bit rate: 115200

But when I try to use the slip-router with DOS/MTCP it doesnt seems to be recognized :(
For PING (like 192.168.6.41 or 8.8.8.8) and TELNET I do get TimeOuts only.
But the blue LED is blinking when MTCP did try to send some packets to the slip-router.

I did test the RS232-Connection successfully with TELIX (a Terminal-Programm) so my cable/pinout is OK and with another simple-serial-sketch the serial Connection doesnt have problem with 115.200Baud.

When I restart the slip-router while connected with TELIX at 115.200Baud I do get always the same chars, but they arent readable (doenst know if there should something readable from the slip-protocol) :(

[EDIT]
the unreadable chars in TELIX are the Bootloader Messages of the ESP8266 at 74880 Baud
(and TELIX cant handle this Baudrate in DOS):

 ets Jan  8 2013,rst cause:2, boot mode:(3,7)

load 0x40100000, len 31016, room 16
tail 8
chksum 0x07
load 0x3ffe8000, len 2068, room 0
tail 4
chksum 0x2f
load 0x3ffe8820, len 3132, room 4
tail 8
chksum 0xac
csum 0xac
rf cal sector: 1019
freq trace enable 0
rf[112] : 00
rf[113] : 00
rf[114] : 01

SDK ver: 3.0.0-dev(c0f7b44) compiled @ Jun 26 2018 16:54:37
phy ver: 1136_0, pp ver: 10.2

You could see TELIX and my ESP8266-NodeMCU-Pinout here

@martin_ger
Danke schon mal fuer reinbschauen. Evtl. hast Du eine Idee, auch wenn DOS/MTCP nicht Dein FAchgebiet ist - aber per seriellem USB-Kabel klappt DOS/MTCP.

Liebe Gruesse aus Mudany/BUrsa/Tuerkei - bis 2016 hatte ich in Frankfurt/Main gewohnt - also nicht weit weg von Wiesbaden.

Guido Lehwalder

[cshunt]

Have you tried to lower the baud rate? Some older uarts can only handle 38400 reliably. I run 1200 on a couple older serial cards. you have already proven that esp works with a pi.

I have also seen power issues where supplying 5volts from the same power supply on the computer (and ground) has made the esp transmit without error.