All IDE compilation fails with "Mesh was not declared in this scope"

Connectivity BLE // NFC
1

One day out of the blue, all of my mesh devices’ code stopped compiling in the cloud IDE, stating “Mesh was not declared in this scope.”

After some investigation, I decided to strip down to the most basic application:

void setup() {
    waitUntil(Mesh.ready);
}

void loop() {}

This fails with:

Processing  testmesh.ino
make -C ../newlib_nano 
make[1]: Entering directory '/firmware/newlib_nano'
make[1]: Nothing to be done for 'all'.
make[1]: Leaving directory '/firmware/newlib_nano'
make -C ../user 
make[1]: Entering directory '/firmware/user'
Building cpp file: testmesh.cpp
Invoking: ARM GCC CPP Compiler
mkdir -p ../build/target/user/platform-0-lto
arm-none-eabi-gcc -DSTM32_DEVICE -DSTM32F10X_MD -DPLATFORM_THREADING=0 -DPLATFORM_ID=0 -DPLATFORM_NAME=core -DUSBD_VID_SPARK=0x1D50 -DUSBD_PID_DFU=0x607F -DUSBD_PID_CDC=0x607D -DSPARK_PLATFORM -DFLASHEE_EEPROM -g3 -gdwarf-2 -Os -mcpu=cortex-m3 -mthumb -flto -DINCLUDE_PLATFORM=1 -DPRODUCT_ID=0 -DPRODUCT_FIRMWARE_VERSION=65535 -DUSE_STDPERIPH_DRIVER -DDFU_BUILD_ENABLE -DSYSTEM_VERSION_STRING=1.0.0 -DRELEASE_BUILD -I./inc -I../wiring/inc -I../system/inc -I../services/inc -I../services/nanopb -I../communication/src -I../hal/inc -I../hal/shared -I../hal/src/core -I../hal/src/stm32 -I../platform/shared/inc -I../platform/MCU/STM32F1xx/STM32_StdPeriph_Driver/inc -I../platform/MCU/STM32F1xx/STM32_USB_Device_Driver/inc -I../platform/MCU/STM32F1xx/SPARK_Firmware_Driver/inc -I../platform/MCU/shared/STM32/inc -I../platform/MCU/STM32F1xx/CMSIS/Include -I../platform/MCU/STM32F1xx/CMSIS/Device/ST/Include -I../platform/NET/CC3000/CC3000_Host_Driver -I../dynalib/inc -I -I./libraries -I. -MD -MP -MF ../build/target/user/platform-0-ltotestmesh.o.d -ffunction-sections -fdata-sections -Wall -Wno-switch -Wno-error=deprecated-declarations -fmessage-length=0 -fno-strict-aliasing -DSPARK=1 -DPARTICLE=1 -Wundef -DSTART_DFU_FLASHER_SERIAL_SPEED=14400 -DSTART_YMODEM_FLASHER_SERIAL_SPEED=28800 -DSPARK_PLATFORM_NET=CC3000 -fno-builtin-malloc -fno-builtin-free -fno-builtin-realloc  -DLOG_INCLUDE_SOURCE_INFO=1 -DPARTICLE_USER_MODULE -DMODULE_VERSION=1000 -DMODULE_FUNCTION=3 -DMODULE_DEPENDENCY=0,0,0 -DMODULE_DEPENDENCY2=0,0,0 -D_WINSOCK_H -D_GNU_SOURCE -DLOG_MODULE_CATEGORY="\"app\""  -fno-exceptions -fno-rtti -fcheck-new -std=gnu++11 -c -o ../build/target/user/platform-0-ltotestmesh.o testmesh.cpp
In file included from ../wiring/inc/spark_wiring.h:46:0,
                 from ./inc/application.h:40,
                 from testmesh.cpp:1:
testmesh.ino: In lambda function:
testmesh.ino:2:15: error: 'Mesh' was not declared in this scope
     waitUntil(Mesh.ready);
               ^
../wiring/inc/spark_wiring_system.h:445:63: note: in definition of macro 'waitUntil'
 #define waitUntil(condition) System.waitCondition([]{ return (condition)(); })
                                                               ^
../wiring/inc/spark_wiring_system.h: In instantiation of 'static bool SystemClass::waitConditionWhile(Condition, While) [with Condition = setup()::<lambda()>; While = SystemClass::waitCondition(Condition) [with Condition = setup()::<lambda()>]::<lambda()>]':
../wiring/inc/spark_wiring_system.h:254:34:   required from 'static bool SystemClass::waitCondition(Condition) [with Condition = setup()::<lambda()>]'
testmesh.ino:2:5:   required from here
../wiring/inc/spark_wiring_system.h:247:39: error: could not convert '_condition.setup()::<lambda()>()' from 'void' to 'bool'
         while (_while() && !_condition()) {
                                       ^
../wiring/inc/spark_wiring_system.h:247:28: error: in argument to unary !
         while (_while() && !_condition()) {
                            ^
../wiring/inc/spark_wiring_system.h:250:27: error: void value not ignored as it ought to be
         return _condition();
                           ^
../build/module.mk:265: recipe for target '../build/target/user/platform-0-ltotestmesh.o' failed
make[1]: Leaving directory '/firmware/user'
make[1]: *** [../build/target/user/platform-0-ltotestmesh.o] Error 1
../build/recurse.mk:11: recipe for target 'user' failed
make: *** [user] Error 2
2

Can you make sure you've selected a Mesh device to compile against?

3

Wasn’t aware that I had to. That fixes it. Thanks!

1 Like