I also met the same problem. Is there any result so far? I'm not sure if it's a device or gateway problem.

Problem: Can add and remove devices, but can not control switch on/off for switch devices.

Device:  ZGM130S， ..\v5\developer\sdks\gecko_sdk_suite\v3.0\protocol\z-wave\Apps\bin\ZW_SerialAPI_Controller_7.14.1_241_ZGM130S_REGION_CN.hex

zipgateway: C:\SiliconLabs\SimplicityStudio\v5\developer\sdks\zwave\zip_gateway\v7.14.1\Source\zipgateway-7.14.01-Source.tar

zware: C:\SiliconLabs\SimplicityStudio\v5\developer\sdks\zwave\zware\v7.14.1\REL14434_7.14.01\src\zware.tar

Runing Platform: mips_32  Little-Endian,   using zipgateway and ~/demo/controller_app for test, run the same board(locally).

Compile platform: Ubuntu18.04 64

DIR:

halley@halley-VirtualBox:~/zwave/7_14_1$ ls -l
total 115580
drwxr-xr-x 5 halley halley      4096 7月  27 13:16 json-c
drwxr-xr-x 7 halley halley      4096 9月  22 14:41 libusb-1.0.9
lrwxrwxrwx 1 halley halley        42 9月  23 14:43 openssl -> ./zware/zwportal/src/zwave/openssl-1.1.1d/
drwxr-xr-x 9 halley halley      4096 7月  15 10:00 toolchain
drwxr-xr-x 3 halley halley      4096 9月  22 11:44 zipgateway-7.14.01-Source
drwxr-xr-x 3 halley halley      4096 9月  22 11:44 zipgateway-7.14.01-Source_
-rwxrwx--- 1 halley halley   3032499 7月   8 10:23 zipgateway-7.14.01-Source.tar.bz2
drwxr-xr-x 3 halley halley      4096 9月  22 17:58 zware
-rwxrwx--- 1 halley halley 115288927 7月   8 14:07 zware.tar.gz

Zipgateway:

set(CMAKE_SYSTEM_NAME Generic)
set(CMAKE_SYSTEM_PROCESSOR mips)
set(CONFIGURE_HOST mips-linux)
set(CMAKE_SYSTEM_VERSION 1)
set(OPENWRT 1)

set(CMAKE_ROOT_PATH "/home/halley/zwave/7_14_1")
set(CMAKE_FIND_ROOT_PATH "/home/halley/zwave/7_14_1/toolchain")

# Search for programs in the custom directories ONLY
set(CMAKE_FIND_ROOT_PATH_MODE_PROGRAM NEVER)

set(OPENSSL_ROOT_DIR "${CMAKE_ROOT_PATH}/openssl/install")
set(OPENSSL_SSL_LIBRARY "${OPENSSL_ROOT_DIR}/lib/libssl.a")
set(OPENSSL_CRYPTO_LIBRARY "${OPENSSL_ROOT_DIR}/lib/libcrypto.a")
set(OPENSSL_INCLUDE_DIR "${OPENSSL_ROOT_DIR}/include/")
set(PLATFORM_INCLUDE_DIR "${CMAKE_FIND_ROOT_PATH}/include")
set(JSON_C_SRC "${CMAKE_FIND_ROOT_PATH}/json-c/out")

# for libraries and headers in the target directories
set(CMAKE_FIND_ROOT_PATH_MODE_LIBRARY ONLY)
set(CMAKE_FIND_ROOT_PATH_MODE_INCLUDE ONLY)
set(OPENSSL_USE_STATIC_LIBS TRUE)
set(CUSTOM_PKG_CONFIG_PATH "${LIBUSB_SRC}/lib/pkgconfig:${JSON_C_SRC}/lib/pkgconfig")
set(CMAKE_C_COMPILER "${CMAKE_ROOT_PATH}/toolchain/bin/mips-linux-gcc")

set(SKIP_TESTING 1)

halley@halley-VirtualBox:~/zwave/7_14_1/zipgateway-7.14.01-Source/usr/local/build_mips$ cmake -DDISABLE_DTLS=False -DCMAKE_TOOLCHAIN_FILE=../cmake/mips_halley.cmake ..
-- Using toolchain file: ../cmake/mips_halley.cmake
-- The C compiler identification is GNU 4.4.7
-- Check for working C compiler: /home/halley/zwave/7_14_1/toolchain/bin/mips-linux-gcc
-- Check for working C compiler: /home/halley/zwave/7_14_1/toolchain/bin/mips-linux-gcc -- works
-- Detecting C compiler ABI info
-- Detecting C compiler ABI info - done
-- Detecting C compile features
-- Detecting C compile features - done
-- Setting build type to 'Debug' as none was specified.
-- Found PkgConfig: /usr/bin/pkg-config (found version "0.29.1") 
-- Checking for module 'libusb-1.0'
--   Found libusb-1.0, version 1.0.21
-- Found OpenSSL: /home/halley/zwave/7_14_1/openssl/install/lib/libcrypto.a (found suitable version "1.1.1d", minimum required is "1.1.0") 
-- Found BISON: /usr/bin/bison (found suitable version "3.0.4", minimum required is "3.0.4") 
-- Found FLEX: /usr/bin/flex (found version "2.6.4") 
-- TestFramework from /home/halley/zwave/7_14_1/zipgateway-7.14.01-Source/usr/local/libs2/TestFramework included
-- Found PythonInterp: /usr/bin/python (found version "2.7.17") 
-- Found Doxygen: /usr/bin/doxygen (found version "1.8.13") found components:  doxygen dot 
-- Checking for module 'json-c'
--   Found json-c, version 0.12.1
-- Checking for module 'json-c'
--   Found json-c, version 0.12.1
-- Found Python: /usr/bin/python (found version "2.7.17"
-- Successfully parsed /home/halley/zwave/7_14_1/zipgateway-7.14.01-Source/usr/local/systools/doc/zgw_json.schema.json
-- Successfully parsed /home/halley/zwave/7_14_1/zipgateway-7.14.01-Source/usr/local/systools/doc/zw_controller.schema.json
-- VERSION_MAJOR: 7
-- VERSION_MINOR: 14
-- VERSION_SHA1: release
-- PATCH_LEVEL: 01
-- VERSION_TWEAK: 
-- VERSION_SHORT: 7.14.01.release
-- Found Plantuml JAR: /opt/plantuml.jar
-- Found Java: /usr/bin/java (found version "1.8.0.252") found components:  Runtime 
-- openssl libraries: /home/halley/zwave/7_14_1/openssl/install/lib/libssl.a;/home/halley/zwave/7_14_1/openssl/install/lib/libcrypto.a
-- libusb libraries: /home/halley/zwave/7_14_1/toolchain/lib/libusb-1.0.a
-- Configuring done
-- Generating done
-- Build files have been written to: /home/halley/zwave/7_14_1/zipgateway-7.14.01-Source/usr/local/build_mips

ZWARE:

halley@halley-VirtualBox:~/zwave/7_14_1$ cd zware/zwportal/src/zwave/hcapi/
halley@halley-VirtualBox:~/zwave/7_14_1/zware/zwportal/src/zwave/hcapi$ source install_openssl_lib.sh
halley@halley-VirtualBox:~/zwave/7_14_1/zware/zwportal/src/zwave/hcapi$ source build_openssl_lib.sh mips_halley debug no-shared
Configuring for platform mips_halley, debug version, no-shared objects
Configuring OpenSSL version 1.1.1d (0x1010104fL) for linux-generic32
Using os-specific seed configuration
Creating configdata.pm
Creating Makefile
...
*** Installing engines
make depend && make _build_programs
make[1]: Entering directory '/home/halley/zwave/7_14_1/zware/zwportal/src/zwave/openssl-1.1.1d'
make[1]: Leaving directory '/home/halley/zwave/7_14_1/zware/zwportal/src/zwave/openssl-1.1.1d'
make[1]: Entering directory '/home/halley/zwave/7_14_1/zware/zwportal/src/zwave/openssl-1.1.1d'
make[1]: Nothing to be done for '_build_programs'.
make[1]: Leaving directory '/home/halley/zwave/7_14_1/zware/zwportal/src/zwave/openssl-1.1.1d'
created directory `/home/halley/zwave/7_14_1/zware/zwportal/src/zwave/openssl/install/bin'
*** Installing runtime programs
install apps/openssl -> /home/halley/zwave/7_14_1/zware/zwportal/src/zwave/openssl/install/bin/openssl
install ./tools/c_rehash -> /home/halley/zwave/7_14_1/zware/zwportal/src/zwave/openssl/install/bin/c_rehash
Build start time: 2020年 09月 25日 星期五 10:03:20 CST
Build stop time: 2020年 09月 25日 星期五 10:06:17 CST
halley@halley-VirtualBox:~/zwave/7_14_1/zware/zwportal/src/zwave/hcapi$ 
halley@halley-VirtualBox:~/zwave/7_14_1/zware/zwportal/src/zwave/hcapi$ make TARGET_PLATFORM=MIPS_HALLEY_ZIP2 DEBUG=1 SHARED=0 MULTI_CLIENT=1
make[1]: Entering directory '/home/halley/zwave/7_14_1/zware/zwportal/src/zwave/hcapi/lib'
make libzip_api_static
make[2]: Entering directory '/home/halley/zwave/7_14_1/zware/zwportal/src/zwave/hcapi/lib'
creating dir static
...
creating static library
/home/halley/zwave/toolchain/bin/msdk-linux-ar -r libzip_ctl.a static/zip_api_base.o static/zip_rpt_hdlr.o static/zip_api_intf.o static/zip_api_network.o static/zip_api_sm.o static/zip_intf_sm.o static/zip_api_util.o static/zip_poll.o static/zip_set_poll.o static/zip_dev_poll.o static/zip_sleep_dev_poll.o static/zip_supervision.o static/zip_event_gen.o static/zip_ima.o static/cjson.o static/zip_dev_cfg.o static/zip_network_save.o static/zip_pstorage.o
/home/halley/zwave/toolchain/bin/msdk-linux-ar: creating libzip_ctl.a
Finished creating static library

make[2]: Leaving directory '/home/halley/zwave/7_14_1/zware/zwportal/src/zwave/hcapi/src'
make[1]: Leaving directory '/home/halley/zwave/7_14_1/zware/zwportal/src/zwave/hcapi/src'
halley@halley-VirtualBox:~/zwave/7_14_1/zware/zwportal/src/zwave/hcapi$ 
halley@halley-VirtualBox:~/zwave/7_14_1/zware/zwportal/src/zwave/hcapi/demos$ make TARGET_PLATFORM=MIPS_HALLEY_ZIP2 DEBUG=1 SHARED=0 MULTI_CLIENT=1
make -C add_node 'CC=/home/halley/zwave/toolchain/bin/mips-linux-gcc' 'CFLAGS= -fPIC -DZIP_V2 -DUSE_OPENSSL -pthread -I/home/halley/zwave/toolchain/include -DCONFIG_DEBUG' 'AR=/home/halley/zwave/toolchain/bin/mips-linux-ar' all
make[1]: Entering directory '/home/halley/zwave/7_14_1/zware/zwportal/src/zwave/hcapi/demos/add_node'
Compiling file: add_node.c
/home/halley/zwave/toolchain/bin/mips-linux-gcc -g -O0  -I../../../openssl/install/include/openssl  -I../../../openssl/install/include -Wall -DOS_LINUX -fPIC -DZIP_V2 -DUSE_OPENSSL -pthread -I/home/halley/zwave/toolchain/include -DCONFIG_DEBUG -c -o"add_node.o" "add_node.c"
Finished compiling: add_node.c
...
Finished compiling: controller_app.c
 
Building target: controller_app
/home/halley/zwave/toolchain/bin/mips-linux-gcc -L"../../lib" -L"../../src" -L"../../../openssl/install/lib"  -o controller_app controller_app.o -lzip_ctl -lzip_api -lm -pthread -lrt -lssl -lcrypto -ldl
Finished building target: controller_app
 

make[1]: Leaving directory '/home/halley/zwave/7_14_1/zware/zwportal/src/zwave/hcapi/demos/controller_app_simon'
halley@halley-VirtualBox:~/zwave/7_14_1/zware/zwportal/src/zwave/hcapi/demos$

I changed the makefile to support my hardware:

halley@halley-VirtualBox:~/zwave/7_14_1/zware/zwportal/src/zwave/hcapi$ cat build_openssl_lib.sh | grep -C 3 halley

if [ $# -lt 2 ]; then
    display_usage
elif [ $1 != linux -a $1 != beaglebone -a $1 != raspberry -a $1 != smp86xx -a $1 != smp87xx -a $1 != mips_openwrt -a $1 != mips_halley -a $1 != android -a $1 != osx ]; then
    display_usage
elif [ $2 != debug -a $2 != release ]; then
    display_usage
--
            CC=mips-openwrt-linux-gcc LD=mips-openwrt-linux-ld AR=mips-openwrt-linux-ar RANLIB=mips-openwrt-linux-ranlib NM=mips-openwrt-linux-nm  ./Configure $openssl_lib_cfg
            sed -i "s/^CFLAG=\(.*\)/CFLAG=\1 -fPIC/" Makefile
            ;;
    mips_halley ) openssl_lib_cfg=$cfg_linux_le
            toolchain="/home/halley/zwave/toolchain/bin/msdk-linux"
            CC=$toolchain-gcc LD=$toolchain-ld AR=$toolchain-ar RANLIB=$toolchain-ranlib NM=$toolchain-nm  ./Configure $openssl_lib_cfg
            sed -i "s/^CFLAG=\(.*\)/CFLAG=\1 -fPIC/" Makefile
            ;;
halley@halley-VirtualBox:~/zwave/7_14_1/zware/zwportal/src/zwave/hcapi$ cat Makefile | grep -C 2 halley
ifeq ($(TARGET_PLATFORM),MIPS_HALLEY_ZIP2)
	# l-Endian MIPS architecture
	MAKE_PARAM_CC = 'CC=/home/halley/zwave/toolchain/bin/msdk-linux-gcc'
	MAKE_PARAM_AR = 'AR=/home/halley/zwave/toolchain/bin/msdk-linux-ar'
	CFLAG += -fPIC -DZIP_V2 -DUSE_OPENSSL -pthread -I/home/halley/zwave/toolchain/include
endif

halley@halley-VirtualBox:~/zwave/7_14_1/zware/zwportal/src/zwave/hcapi$ 

After put zipgateway and controller_app into my hardware platform. I can add and remove device, but can not control it.  I also put 'l' and 'd' in zipgateway after controll device fail.

The problem is same on my platform, I'm not sure it is an ip issue, for I can recove report after 10~20S,  while the local button pressed.The line "ApplicationCommandHandler 6->1 class 0x20 cmd 0x03 size 3" indicate that the gateway got massge from sub-device, but DTLS timeout at next lines. After 10~20S. The line "node_input_queued: Packet for DTLS_PORT uip_len: 77" printed., I got message from gateway.

The app and gateway run the same board, using IPV6 UDP communication.

@A.E.M
As you said “You can use the tap0 interface directly. There is no need to attach it to a bridge with other network interfaces if you intend to use it only "locally" .
Can you tell me how to achieve local access? I have compiled the source code of zipgateway and intend to use Z/ IP C API to connect to zipgateway, and now zipgateway is not working properly.

Logs are:

@A.E.M
As you said “You can use the tap0 interface directly. There is no need to attach it to a bridge with other network interfaces if you intend to use it only "locally" .
Can you tell me how to achieve local access? I have compiled the source code of zipgateway and intend to use Z/ IP C API to connect to zipgateway, and now zipgateway is not working properly.

254380 DHCP pass completed
254380 update flag 0x1 0x85
258980 zip tcp clinet connection closed/aborted/timedout.
266980 tcp_client_connect: executed.
270380 DHCP Timeout
270380 Sending DISCOVER
270381 DHCP pass completed
270381 update flag 0x1 0x85
272109 got OFFER
272109 send REQUEST
272113 got ACK
272113 Node 1 has ipv4 address 192.168.1.11
272113 Checking for new sessions
272113 New IPv4 assigned for node 1
272114 DHCP pass completed
272115 Error executing: /usr/local/etc/zipgateway.fin. errno=2, strerror=No such file or directory
272115 update flag 0x1 0x85
272115 DHCP pass completed
272115 update flag 0x1 0x85
317180 zip tcp clinet connection closed/aborted/timedout.
317180 zip tcp clinet connection closed/aborted/timedout.
325180 tcp_client_connect: executed.
325180 tcp_client_connect: executed.

357217 IP addresses:
fd00:aaaa::03
fd00:bbbb::01
fe80::21e:32ff:fe17:7dd9
357217 IPv4 address 192.168.1.11:
357217 Neighbor cache:
357217 Routes:
357217 Default Routes:
375280 zip tcp clinet connection closed/aborted/timedout.
375480 zip tcp clinet connection closed/aborted/timedout.

@A.E.M
As you said “You can use the tap0 interface directly. There is no need to attach it to a bridge with other network interfaces if you intend to use it only "locally" .
Can you tell me how to achieve local access? I have compiled the source code of zipgateway and intend to use Z/ IP C API to connect to zipgateway, and now zipgateway is not working properly.
 

254380 DHCP pass completed
254380 update flag 0x1 0x85
258980 zip tcp clinet connection closed/aborted/timedout.
266980 tcp_client_connect: executed.
270380 DHCP Timeout
270380 Sending DISCOVER
270381 DHCP pass completed
270381 update flag 0x1 0x85
272109 got OFFER
272109 send REQUEST
272113 got ACK
272113 Node 1 has ipv4 address 192.168.1.11
272113 Checking for new sessions
272113 New IPv4 assigned for node 1
272114 DHCP pass completed
272115 Error executing: /usr/local/etc/zipgateway.fin. errno=2, strerror=No such file or directory
272115 update flag 0x1 0x85
272115 DHCP pass completed
272115 update flag 0x1 0x85
317180 zip tcp clinet connection closed/aborted/timedout.
317180 zip tcp clinet connection closed/aborted/timedout.
325180 tcp_client_connect: executed.
325180 tcp_client_connect: executed.

357217 IP addresses:
fd00:aaaa::03
fd00:bbbb::01
fe80::21e:32ff:fe17:7dd9
357217 IPv4 address 192.168.1.11:
357217 Neighbor cache:
357217 Routes:
357217 Default Routes:
375280 zip tcp clinet connection closed/aborted/timedout.
375480 zip tcp clinet connection closed/aborted/timedout.