I read the description of the environment it was modified CP210x driver for the 2.6.38 kernel (Ubuntu 11.04).However, I am now running Ubuntu 16.04, 4.13.0-35-generic.
See the error messages below. Is this driver still needed to program/use M5Stack. If yes, has anyone succeeded compiling it?

make[1]: Entering directory '/usr/src/linux-headers-4.13.0-35-generic'
CC [M] /home/esp32/Downloads/Linux_2.6.x_VCP_Driver_Source/cp210x.o
/home/esp32/Downloads/Linux_2.6.x_VCP_Driver_Source/cp210x.c:165:12: error: ‘usb_serial_probe’ undeclared here (not in a function)
.probe = usb_serial_probe,
^
/home/esp32/Downloads/Linux_2.6.x_VCP_Driver_Source/cp210x.c:166:16: error: ‘usb_serial_disconnect’ undeclared here (not in a function)
.disconnect = usb_serial_disconnect,
^
/home/esp32/Downloads/Linux_2.6.x_VCP_Driver_Source/cp210x.c:181:13: error: initialization from incompatible pointer type [-Werror=incompatible-pointer-types]
.ioctl = cp210x_ioctl,
^
/home/esp32/Downloads/Linux_2.6.x_VCP_Driver_Source/cp210x.c:181:13: note: (near initialization for ‘cp210x_device.ioctl’)
/home/esp32/Downloads/Linux_2.6.x_VCP_Driver_Source/cp210x.c:184:16: error: initialization from incompatible pointer type [-Werror=incompatible-pointer-types]
.tiocmget = cp210x_tiocmget,
^
/home/esp32/Downloads/Linux_2.6.x_VCP_Driver_Source/cp210x.c:184:16: note: (near initialization for ‘cp210x_device.tiocmget’)
/home/esp32/Downloads/Linux_2.6.x_VCP_Driver_Source/cp210x.c:185:15: error: initialization from incompatible pointer type [-Werror=incompatible-pointer-types]
.tiocmset = cp210x_tiocmset,
^
/home/esp32/Downloads/Linux_2.6.x_VCP_Driver_Source/cp210x.c:185:15: note: (near initialization for ‘cp210x_device.tiocmset’)
/home/esp32/Downloads/Linux_2.6.x_VCP_Driver_Source/cp210x.c: In function ‘cp210x_get_config’:
/home/esp32/Downloads/Linux_2.6.x_VCP_Driver_Source/cp210x.c:321:3: error: implicit declaration of function ‘dbg’ [-Werror=implicit-function-declaration]
dbg("%s - Unable to send config request, "
^
/home/esp32/Downloads/Linux_2.6.x_VCP_Driver_Source/cp210x.c: In function ‘cp210x_open’:
/home/esp32/Downloads/Linux_2.6.x_VCP_Driver_Source/cp210x.c:426:36: error: ‘struct usb_serial_port’ has no member named ‘number’
dbg("%s - port %d", func, port->number);
^
/home/esp32/Downloads/Linux_2.6.x_VCP_Driver_Source/cp210x.c: In function ‘cp210x_cleanup’:
/home/esp32/Downloads/Linux_2.6.x_VCP_Driver_Source/cp210x.c:459:36: error: ‘struct usb_serial_port’ has no member named ‘number’
dbg("%s - port %d", func, port->number);
^
/home/esp32/Downloads/Linux_2.6.x_VCP_Driver_Source/cp210x.c: In function ‘cp210x_close’:
/home/esp32/Downloads/Linux_2.6.x_VCP_Driver_Source/cp210x.c:472:36: error: ‘struct usb_serial_port’ has no member named ‘number’
dbg("%s - port %d", func, port->number);
^
/home/esp32/Downloads/Linux_2.6.x_VCP_Driver_Source/cp210x.c: In function ‘cp210x_get_termios’:
/home/esp32/Downloads/Linux_2.6.x_VCP_Driver_Source/cp210x.c:597:17: error: invalid type argument of ‘->’ (have ‘struct ktermios’)
&tty->termios->c_cflag, &baud);
^
/home/esp32/Downloads/Linux_2.6.x_VCP_Driver_Source/cp210x.c: In function ‘cp210x_get_termios_port’:
/home/esp32/Downloads/Linux_2.6.x_VCP_Driver_Source/cp210x.c:619:36: error: ‘struct usb_serial_port’ has no member named ‘number’
dbg("%s - port %d", func, port->number);
^
/home/esp32/Downloads/Linux_2.6.x_VCP_Driver_Source/cp210x.c: In function ‘cp210x_set_termios’:
/home/esp32/Downloads/Linux_2.6.x_VCP_Driver_Source/cp210x.c:752:36: error: ‘struct usb_serial_port’ has no member named ‘number’
dbg("%s - port %d", func, port->number);
^
/home/esp32/Downloads/Linux_2.6.x_VCP_Driver_Source/cp210x.c:757:14: error: invalid type argument of ‘->’ (have ‘struct ktermios’)
tty->termios->c_cflag &= ~CMSPAR;
^
/home/esp32/Downloads/Linux_2.6.x_VCP_Driver_Source/cp210x.c:758:22: error: invalid type argument of ‘->’ (have ‘struct ktermios’)
cflag = tty->termios->c_cflag;
^
/home/esp32/Downloads/Linux_2.6.x_VCP_Driver_Source/cp210x.c: In function ‘cp210x_tiocmset_port’:
/home/esp32/Downloads/Linux_2.6.x_VCP_Driver_Source/cp210x.c:887:36: error: ‘struct usb_serial_port’ has no member named ‘number’
dbg("%s - port %d", func, port->number);
^
/home/esp32/Downloads/Linux_2.6.x_VCP_Driver_Source/cp210x.c: In function ‘cp210x_tiocmget’:
/home/esp32/Downloads/Linux_2.6.x_VCP_Driver_Source/cp210x.c:926:36: error: ‘struct usb_serial_port’ has no member named ‘number’
dbg("%s - port %d", func, port->number);
^
/home/esp32/Downloads/Linux_2.6.x_VCP_Driver_Source/cp210x.c: In function ‘cp210x_break_ctl’:
/home/esp32/Downloads/Linux_2.6.x_VCP_Driver_Source/cp210x.c:948:36: error: ‘struct usb_serial_port’ has no member named ‘number’
dbg("%s - port %d", func, port->number);
^
/home/esp32/Downloads/Linux_2.6.x_VCP_Driver_Source/cp210x.c: In function ‘cp210x_init’:
/home/esp32/Downloads/Linux_2.6.x_VCP_Driver_Source/cp210x.c:1013:11: error: implicit declaration of function ‘usb_serial_register’ [-Werror=implicit-function-declaration]
retval = usb_serial_register(&cp210x_device);
^
/home/esp32/Downloads/Linux_2.6.x_VCP_Driver_Source/cp210x.c:1020:3: error: implicit declaration of function ‘usb_serial_deregister’ [-Werror=implicit-function-declaration]
usb_serial_deregister(&cp210x_device);
^
In file included from ./include/linux/module.h:18:0,
from /home/esp32/Downloads/Linux_2.6.x_VCP_Driver_Source/cp210x.c:21:
/home/esp32/Downloads/Linux_2.6.x_VCP_Driver_Source/cp210x.c: In function ‘__check_debug’:
./include/linux/moduleparam.h:346:67: error: return from incompatible pointer type [-Werror=incompatible-pointer-types]
static inline type __always_unused *_check##name(void) { return(p); }
^
./include/linux/moduleparam.h:398:35: note: in expansion of macro ‘__param_check’
#define param_check_bool(name, p) _param_check(name, p, bool)
^
./include/linux/moduleparam.h:148:2: note: in expansion of macro ‘param_check_bool’
param_check##type(name, &(value));
^
./include/linux/moduleparam.h:128:2: note: in expansion of macro ‘module_param_named’
module_param_named(name, name, type, perm)
^
/home/esp32/Downloads/Linux_2.6.x_VCP_Driver_Source/cp210x.c:1043:1: note: in expansion of macro ‘module_param’
module_param(debug, bool, S_IRUGO | S_IWUSR);
^
cc1: some warnings being treated as errors
scripts/Makefile.build:315: recipe for target '/home/esp32/Downloads/Linux_2.6.x_VCP_Driver_Source/cp210x.o' failed
make[2]: *** [/home/esp32/Downloads/Linux_2.6.x_VCP_Driver_Source/cp210x.o] Error 1
Makefile:1550: recipe for target 'module/home/esp32/Downloads/Linux_2.6.x_VCP_Driver_Source' failed
make[1]: *** [module/home/esp32/Downloads/Linux_2.6.x_VCP_Driver_Source] Error 2
make[1]: Leaving directory '/usr/src/linux-headers-4.13.0-35-generic'
Makefile:4: recipe for target 'all' failed
make: *** [all] Error 2

The conclusion is that the 5V Vcc cannot connect to 3.3V device.

The Grove's Vcc would be nice to be 3.3V as the ESP32 is powered by 3.3V. Also, the Grove socket/connector is too tight, so much so, Grove male connector will break the edge.

I gave it a go using all esp-idf components and a program without M5Stack. I then hit the command, "make flash monitor". The result is as what you said. Awesome!

I would like use your source to get the TFT LCD screen to work first. Do you have any advise for me that I should aware, avoid, etc, please?

Thank you

Did you refer to the driver or the M5Stack-idf? All my esp-idf drivers and examples as well as the Webradio Bluetooth Speaker work without any issues. Can you be more specific, please?

Has anyone encounter similar problem in Ubuntu?

insmod: ERROR: could not insert module /lib/modules/4.13.0-35-generic/kernel/drivers/usb/serial/cp210x.ko: Invalid module format

I read the description of the environment it was modified CP210x driver for the 2.6.38 kernel (Ubuntu 11.04).However, I am now running Ubuntu 16.04, 4.13.0-35-generic.
See the error messages below. Is this driver still needed to program/use M5Stack. If yes, has anyone succeeded compiling it?

make[1]: Entering directory '/usr/src/linux-headers-4.13.0-35-generic'
CC [M] /home/esp32/Downloads/Linux_2.6.x_VCP_Driver_Source/cp210x.o
/home/esp32/Downloads/Linux_2.6.x_VCP_Driver_Source/cp210x.c:165:12: error: ‘usb_serial_probe’ undeclared here (not in a function)
.probe = usb_serial_probe,
^
/home/esp32/Downloads/Linux_2.6.x_VCP_Driver_Source/cp210x.c:166:16: error: ‘usb_serial_disconnect’ undeclared here (not in a function)
.disconnect = usb_serial_disconnect,
^
/home/esp32/Downloads/Linux_2.6.x_VCP_Driver_Source/cp210x.c:181:13: error: initialization from incompatible pointer type [-Werror=incompatible-pointer-types]
.ioctl = cp210x_ioctl,
^
/home/esp32/Downloads/Linux_2.6.x_VCP_Driver_Source/cp210x.c:181:13: note: (near initialization for ‘cp210x_device.ioctl’)
/home/esp32/Downloads/Linux_2.6.x_VCP_Driver_Source/cp210x.c:184:16: error: initialization from incompatible pointer type [-Werror=incompatible-pointer-types]
.tiocmget = cp210x_tiocmget,
^
/home/esp32/Downloads/Linux_2.6.x_VCP_Driver_Source/cp210x.c:184:16: note: (near initialization for ‘cp210x_device.tiocmget’)
/home/esp32/Downloads/Linux_2.6.x_VCP_Driver_Source/cp210x.c:185:15: error: initialization from incompatible pointer type [-Werror=incompatible-pointer-types]
.tiocmset = cp210x_tiocmset,
^
/home/esp32/Downloads/Linux_2.6.x_VCP_Driver_Source/cp210x.c:185:15: note: (near initialization for ‘cp210x_device.tiocmset’)
/home/esp32/Downloads/Linux_2.6.x_VCP_Driver_Source/cp210x.c: In function ‘cp210x_get_config’:
/home/esp32/Downloads/Linux_2.6.x_VCP_Driver_Source/cp210x.c:321:3: error: implicit declaration of function ‘dbg’ [-Werror=implicit-function-declaration]
dbg("%s - Unable to send config request, "
^
/home/esp32/Downloads/Linux_2.6.x_VCP_Driver_Source/cp210x.c: In function ‘cp210x_open’:
/home/esp32/Downloads/Linux_2.6.x_VCP_Driver_Source/cp210x.c:426:36: error: ‘struct usb_serial_port’ has no member named ‘number’
dbg("%s - port %d", func, port->number);
^
/home/esp32/Downloads/Linux_2.6.x_VCP_Driver_Source/cp210x.c: In function ‘cp210x_cleanup’:
/home/esp32/Downloads/Linux_2.6.x_VCP_Driver_Source/cp210x.c:459:36: error: ‘struct usb_serial_port’ has no member named ‘number’
dbg("%s - port %d", func, port->number);
^
/home/esp32/Downloads/Linux_2.6.x_VCP_Driver_Source/cp210x.c: In function ‘cp210x_close’:
/home/esp32/Downloads/Linux_2.6.x_VCP_Driver_Source/cp210x.c:472:36: error: ‘struct usb_serial_port’ has no member named ‘number’
dbg("%s - port %d", func, port->number);
^
/home/esp32/Downloads/Linux_2.6.x_VCP_Driver_Source/cp210x.c: In function ‘cp210x_get_termios’:
/home/esp32/Downloads/Linux_2.6.x_VCP_Driver_Source/cp210x.c:597:17: error: invalid type argument of ‘->’ (have ‘struct ktermios’)
&tty->termios->c_cflag, &baud);
^
/home/esp32/Downloads/Linux_2.6.x_VCP_Driver_Source/cp210x.c: In function ‘cp210x_get_termios_port’:
/home/esp32/Downloads/Linux_2.6.x_VCP_Driver_Source/cp210x.c:619:36: error: ‘struct usb_serial_port’ has no member named ‘number’
dbg("%s - port %d", func, port->number);
^
/home/esp32/Downloads/Linux_2.6.x_VCP_Driver_Source/cp210x.c: In function ‘cp210x_set_termios’:
/home/esp32/Downloads/Linux_2.6.x_VCP_Driver_Source/cp210x.c:752:36: error: ‘struct usb_serial_port’ has no member named ‘number’
dbg("%s - port %d", func, port->number);
^
/home/esp32/Downloads/Linux_2.6.x_VCP_Driver_Source/cp210x.c:757:14: error: invalid type argument of ‘->’ (have ‘struct ktermios’)
tty->termios->c_cflag &= ~CMSPAR;
^
/home/esp32/Downloads/Linux_2.6.x_VCP_Driver_Source/cp210x.c:758:22: error: invalid type argument of ‘->’ (have ‘struct ktermios’)
cflag = tty->termios->c_cflag;
^
/home/esp32/Downloads/Linux_2.6.x_VCP_Driver_Source/cp210x.c: In function ‘cp210x_tiocmset_port’:
/home/esp32/Downloads/Linux_2.6.x_VCP_Driver_Source/cp210x.c:887:36: error: ‘struct usb_serial_port’ has no member named ‘number’
dbg("%s - port %d", func, port->number);
^
/home/esp32/Downloads/Linux_2.6.x_VCP_Driver_Source/cp210x.c: In function ‘cp210x_tiocmget’:
/home/esp32/Downloads/Linux_2.6.x_VCP_Driver_Source/cp210x.c:926:36: error: ‘struct usb_serial_port’ has no member named ‘number’
dbg("%s - port %d", func, port->number);
^
/home/esp32/Downloads/Linux_2.6.x_VCP_Driver_Source/cp210x.c: In function ‘cp210x_break_ctl’:
/home/esp32/Downloads/Linux_2.6.x_VCP_Driver_Source/cp210x.c:948:36: error: ‘struct usb_serial_port’ has no member named ‘number’
dbg("%s - port %d", func, port->number);
^
/home/esp32/Downloads/Linux_2.6.x_VCP_Driver_Source/cp210x.c: In function ‘cp210x_init’:
/home/esp32/Downloads/Linux_2.6.x_VCP_Driver_Source/cp210x.c:1013:11: error: implicit declaration of function ‘usb_serial_register’ [-Werror=implicit-function-declaration]
retval = usb_serial_register(&cp210x_device);
^
/home/esp32/Downloads/Linux_2.6.x_VCP_Driver_Source/cp210x.c:1020:3: error: implicit declaration of function ‘usb_serial_deregister’ [-Werror=implicit-function-declaration]
usb_serial_deregister(&cp210x_device);
^
In file included from ./include/linux/module.h:18:0,
from /home/esp32/Downloads/Linux_2.6.x_VCP_Driver_Source/cp210x.c:21:
/home/esp32/Downloads/Linux_2.6.x_VCP_Driver_Source/cp210x.c: In function ‘__check_debug’:
./include/linux/moduleparam.h:346:67: error: return from incompatible pointer type [-Werror=incompatible-pointer-types]
static inline type __always_unused *_check##name(void) { return(p); }
^
./include/linux/moduleparam.h:398:35: note: in expansion of macro ‘__param_check’
#define param_check_bool(name, p) _param_check(name, p, bool)
^
./include/linux/moduleparam.h:148:2: note: in expansion of macro ‘param_check_bool’
param_check##type(name, &(value));
^
./include/linux/moduleparam.h:128:2: note: in expansion of macro ‘module_param_named’
module_param_named(name, name, type, perm)
^
/home/esp32/Downloads/Linux_2.6.x_VCP_Driver_Source/cp210x.c:1043:1: note: in expansion of macro ‘module_param’
module_param(debug, bool, S_IRUGO | S_IWUSR);
^
cc1: some warnings being treated as errors
scripts/Makefile.build:315: recipe for target '/home/esp32/Downloads/Linux_2.6.x_VCP_Driver_Source/cp210x.o' failed
make[2]: *** [/home/esp32/Downloads/Linux_2.6.x_VCP_Driver_Source/cp210x.o] Error 1
Makefile:1550: recipe for target 'module/home/esp32/Downloads/Linux_2.6.x_VCP_Driver_Source' failed
make[1]: *** [module/home/esp32/Downloads/Linux_2.6.x_VCP_Driver_Source] Error 2
make[1]: Leaving directory '/usr/src/linux-headers-4.13.0-35-generic'
Makefile:4: recipe for target 'all' failed
make: *** [all] Error 2

Hi there,
I haven't seen much information on M5Stack using esp-idf FreeRTOS. Hence, I would like to know if anyone out there using M5Stack with esp-idf which is FreeRTOS. What about those drivers, such as TFT-LCD, MPU9520, GSM, etc, are they available in esp-idf?