diff --git a/src/BL0942/shelly_pm_bl0942.cpp b/src/BL0942/shelly_pm_bl0942.cpp
index 049e4d69..0bdca1a6 100644
--- a/src/BL0942/shelly_pm_bl0942.cpp
+++ b/src/BL0942/shelly_pm_bl0942.cpp
@@ -36,24 +36,40 @@ BL0942PowerMeter::BL0942PowerMeter(int id, int tx_pin, int rx_pin,
 BL0942PowerMeter::~BL0942PowerMeter() {
 }
 
+#define BL_READ 0x58
+
+#define BL_WRITE 0xA8
+
+#define BL_SOFT_RESET 0x1C
+
+#define BL_ADDR 0x0
+
+#define BL_WATT 0x6
+
 Status BL0942PowerMeter::Init() {
   if (rx_pin_ < 0 && tx_pin_ < 0) {
     return mgos::Errorf(STATUS_INVALID_ARGUMENT, "no valid pins");
   }
 
   struct mgos_uart_config ucfg;
+  mgos_uart_config_set_defaults(uart_no_, &ucfg);
 
-  ucfg.baud_rate = 4800;
+  ucfg.baud_rate = 9600;
 
   ucfg.dev.rx_gpio = rx_pin_;
   ucfg.dev.tx_gpio = tx_pin_;
 
   if (!mgos_uart_configure(uart_no_, &ucfg)) {
-    LOG(LL_ERROR, ("Failed to configure UART%d", uart_no_));
+    return mgos::Errorf(STATUS_INVALID_ARGUMENT, "Failed to configure UART");
   }
 
+  mgos_uart_set_rx_enabled(uart_no_, true);
+
   meas_timer_.Reset(meas_time_ * 1000, MGOS_TIMER_REPEAT);
   LOG(LL_INFO, ("BL0942 @ %d/%d", rx_pin_, tx_pin_));
+
+  // this->WriteReg(BL_SOFT_RESET, 0x5a5a5a5a);
+
   return Status::OK();
 }
 
@@ -65,40 +81,59 @@ StatusOr<float> BL0942PowerMeter::GetEnergyWH() {
   return aea_;
 }
 
-#define BL_READ 0x58
-#define BL_ADDR 0x3
+bool BL0942PowerMeter::WriteReg(uint8_t reg, uint32_t val) {
+  uint8_t tx_buf[6] = {BL_WRITE | BL_ADDR,
+                       reg,
+                       (uint8_t) ((val >> 0) & 0xFF),
+                       (uint8_t) ((val >> 8) & 0xFF),
+                       (uint8_t) ((val >> 16) & 0xFF),
+                       0};
 
-#define BL_WATT 0x6
+  for (int i = 0; i < 5; i++) {
+    tx_buf[5] += tx_buf[i];
+  }
+  tx_buf[5] = tx_buf[5] ^ 0xFF;
+  mgos_uart_write(uart_no_, tx_buf, 6);
+  mgos_uart_flush(uart_no_);
+  return true;
+}
 
 bool BL0942PowerMeter::ReadReg(uint8_t reg, uint8_t *rx_buf, size_t len) {
   uint8_t tx_buf[2] = {BL_READ | BL_ADDR, reg};
-  mgos_uart_write(uart_no_, tx_buf, 2);
-  mgos_uart_flush(uart_no_);
+  size_t j = mgos_uart_write(uart_no_, tx_buf, 2);
+  size_t j1 = mgos_uart_write_avail(uart_no_);
+  //mgos_uart_flush(uart_no_);
+  LOG(LL_ERROR, ("tx %i %i %02X %02X", j, j1, tx_buf[0], tx_buf[1]));
 
   // Delay to allow data to be available
   int baud = 4800;
-  mgos_msleep(roundf(len * 8 / baud) * 1e3);
+  // mgos_msleep(roundf(len * 8 / baud) * 1e3);
+  bool bla = mgos_uart_is_rx_enabled(uart_no_);
 
   int read_len = mgos_uart_read(uart_no_, rx_buf, len);
+  LOG(LL_ERROR, ("rx %i %i", read_len, bla));
 
   uint8_t chksum = tx_buf[0] + tx_buf[1];
-  for (int i = 0; i < len - 1; i++) {
+  for (int i = 0; i < len; i++) {
     chksum += rx_buf[i];
     LOG(LL_ERROR, ("%08X", rx_buf[i]));
   }
   chksum ^= 0xFF;
 
   if (read_len != len || rx_buf[len - 1] != chksum) {
-    LOG(LL_ERROR, ("wrong checksum") );
+    LOG(LL_ERROR, ("wrong checksum"));
     return false;
   }
   return true;
 }
 
 void BL0942PowerMeter::MeasureTimerCB() {
-  int len = 4;  // including 1 checksum byte
-  uint8_t rx_buf[len];
-  if (this->ReadReg(BL_WATT, rx_buf, len)) {
+  LOG(LL_ERROR, ("timer"));
+  int len = 20;  // including 1 checksum byte
+  uint8_t rx_buf[len] = {};
+  // if (this->ReadReg(0xAA, rx_buf, len)) {
+  // }
+  if (this->ReadReg(BL_WATT, rx_buf, 4)) {
     uint32_t d = rx_buf[2] << 16 | rx_buf[1] << 8 | rx_buf[0];
     if (d & (1 << 23)) {
       d |= 0xFF000000;
diff --git a/src/BL0942/shelly_pm_bl0942.hpp b/src/BL0942/shelly_pm_bl0942.hpp
index 22b8ea23..900e785a 100644
--- a/src/BL0942/shelly_pm_bl0942.hpp
+++ b/src/BL0942/shelly_pm_bl0942.hpp
@@ -39,6 +39,7 @@ class BL0942PowerMeter : public PowerMeter {
   float aea_ = 0;  // Accumulated active energy, Wh.
                    //
   bool ReadReg(uint8_t reg, uint8_t *rx_buf, size_t len);
+  bool WriteReg(uint8_t reg, uint32_t val);
 
   mgos::Timer meas_timer_;
 };
diff --git a/src/ShellyMini1PMGen3/shelly_init.cpp b/src/ShellyMini1PMGen3/shelly_init.cpp
index f56b714c..abdbe152 100644
--- a/src/ShellyMini1PMGen3/shelly_init.cpp
+++ b/src/ShellyMini1PMGen3/shelly_init.cpp
@@ -40,15 +40,15 @@ void CreatePeripherals(std::vector<std::unique_ptr<Input>> *inputs,
   sys_temp->reset(new TempSensorSDNT1608X103F3950(3, 3.3f, 10000.0f));
 #endif
 
-  std::unique_ptr<PowerMeter> pm(new BL0942PowerMeter(1, 6, 7, 100, 1));
+  std::unique_ptr<PowerMeter> pm(new BL0942PowerMeter(1, 6, 7, 20, 1));
   // BL0942 GPIO6 TX GPIO7 RX
-  // const Status &st = pm->Init();
-  // if (st.ok()) {
-  //   pms->emplace_back(std::move(pm));
-  // } else {
-  //   const std::string &s = st.ToString();
-  //   LOG(LL_ERROR, ("PM init failed: %s", s.c_str()));
-  // }
+  const Status &st = pm->Init();
+  if (st.ok()) {
+    pms->emplace_back(std::move(pm));
+  } else {
+    const std::string &s = st.ToString();
+    LOG(LL_ERROR, ("PM init failed: %s", s.c_str()));
+  }
 
   InitSysLED(LED_GPIO, LED_ON);
   InitSysBtn(BTN_GPIO, BTN_DOWN);