MBX_HEARTBEAT
uint8_t actcmd = MBX_HEARTBEAT;
mb->mbxCommand = MBX_HEARTBEAT;
if (mbx_cmnd != MBX_HEARTBEAT) {
if (pmbox->mbxCommand == MBX_HEARTBEAT) {
if (pmbox->mbxCommand == MBX_HEARTBEAT) {
case MBX_HEARTBEAT:
if (pmbox->mbxCommand != MBX_HEARTBEAT) {
if (mbx->mbxCommand != MBX_HEARTBEAT) {