The following steps guide you to DIY SwitchBot using Matter Over Thread running on Silicon Labs
EFR32xG24 Explorer Kit xG24-EK2703A in 5 minutes.
1. Make sure you install Silicon Labs Simplicity Studio v5 and GSDK 4.3.1 with Matter extension 2.1.0-1.1.
2.Connect your xG24-EK2703A kit to your desktop and create "Matter - SoC OnOff Plug over Thread" project as base for your DIY SwitchBot using Matter Over Thread project.
3.Install and add a "sg90" PWM instance in "SOFTWARE COMPONENTS"
4.Configure "sg90" instance to use Timer0 PA00 as PWM output with PWM frequency 50 Hz.
5. Replace source code in "void AppTask::ActionCompleted(OnOffPlugManager::Action_t aAction)" with the following codes (red lines), which implements on/off rotating position for SG90 to turn on/off switch.
//YK for SG90 SwitchBot
#include "sl_pwm.h"
#include "sl_pwm_init_sg90_config.h"
#include "sl_sleeptimer.h"
extern sl_pwm_instance_t sl_pwm_sg90;
void AppTask::ActionCompleted(OnOffPlugManager::Action_t aAction)
{
// action has been completed on the outlet
if (aAction == OnOffPlugManager::ON_ACTION)
{
SILABS_LOG("Outlet ON")
sl_pwm_set_duty_cycle(&sl_pwm_sg90, 2);
sl_pwm_start(&sl_pwm_sg90);
sl_sleeptimer_delay_millisecond(200);
sl_pwm_set_duty_cycle(&sl_pwm_sg90, 5);
sl_sleeptimer_delay_millisecond(200);
sl_pwm_stop(&sl_pwm_sg90);
}
else if (aAction == OnOffPlugManager::OFF_ACTION)
{
SILABS_LOG("Outlet OFF")
sl_pwm_set_duty_cycle(&sl_pwm_sg90, 9);
sl_pwm_start(&sl_pwm_sg90);
sl_sleeptimer_delay_millisecond(200);
sl_pwm_set_duty_cycle(&sl_pwm_sg90, 5);
sl_sleeptimer_delay_millisecond(200);
sl_pwm_stop(&sl_pwm_sg90);
}
#ifdef SL_CATALOG_SIMPLE_BUTTON_PRESENT
if (sAppTask.mSyncClusterToButtonAction)
{
chip::DeviceLayer::PlatformMgr().ScheduleWork(UpdateClusterState, reinterpret_cast<intptr_t>(nullptr));
sAppTask.mSyncClusterToButtonAction = false;
}
#endif
}
6. Add the following two line to set initial SG90 position after "sl_pwm_init(&sl_pwm_sg90, &pwm_sg90_config);" in "void sl_pwm_init_instances(void)".
//YK for SG90 SwitchBot
sl_pwm_set_duty_cycle(&sl_pwm_sg90, 5);
sl_pwm_start(&sl_pwm_sg90);
7. Build and download firmware into xG24-EK2703A kit(remember to dowload bootloader into the kit too)
8. Connect GND, PWR, Signal line of SG90 to GND, 3V3, and PWM pin on xG24-EK2703A kit.
9.Start RTT viewer to get QR code link for Matter Provision.
10. Since Apple Home supports Matter Over Thread now, we use Apple HomePod mini (iOS 17) and iPhone Home App to add our DIY SwitchBot into Apple Home.
11. Now, we can mount the DIY SwitchBot to wall switch and use Apple Home to control wall switch/light remotely.
