SeaAndSand

``` root@myimx6ek140p:~# ./lua main.lua ./lua: error loading module '_cqueues' from file '/usr/local/lib/lua/5.4/_cqueues.so': /usr/local/lib/lua/5.4/_cqueues.so: undefined symbol: CRYPTO_set_locking_callback stack traceback: [C]: in ? [C]: in function 'require' /usr/local/share/lua/5.4/cqueues.lua:2: in function (...tail calls...)...

``` @: arm-linux-gnueabihf-gcc -v Using built-in specs. COLLECT_GCC=arm-linux-gnueabihf-gcc COLLECT_LTO_WRAPPER=/usr/lib/gcc-cross/arm-linux-gnueabihf/5/lto-wrapper Target: arm-linux-gnueabihf Configured with: ../src/configure -v --with-pkgversion='Ubuntu/Linaro 5.4.0-6ubuntu1~16.04.9' --with-bugurl=file:///usr/share/doc/gcc-5/README.Bugs --enable-languages=c,ada,c++,java,go,d,fortran,objc,obj-c++ --prefix=/usr --program-suffix=-5 --enable-shared --enable-linker-build-id --libexecdir=/usr/lib --without-included-gettext --enable-threads=posix --libdir=/usr/lib --enable-nls --with-sysroot=/ --enable-clocale=gnu...

paho-mqtt-c version：1.3.13 myboard：arm32 linux 4.1.15 Adding a heartbeat is because I once encountered a situation where the network signal was actually disconnected. The MQTT server showed it was disconnected, and...

"The only API call allowed in connectionLost is connect。" How should understand this sentence? In fact, I called B client's publish function in A client's connlost. When A client triggers...