diff --git a/src/puara.cpp b/src/puara.cpp
index 38ce3e7..ac41d5d 100644
--- a/src/puara.cpp
+++ b/src/puara.cpp
@@ -178,3 +178,18 @@ bool Puara::get_StaIsConnected()
 {
   return g_puara.wifi.get_StaIsConnected();
 }
+
+bool Puara::set_wifi_tx_power(int8_t max_tx_power)
+{
+  return g_puara.wifi.set_wifi_tx_power(max_tx_power);
+}
+
+bool Puara::set_wifi_channel(int8_t primary)
+{
+  return g_puara.wifi.set_wifi_channel(primary);
+}
+
+int8_t Puara::get_wifi_channel()
+{
+  return g_puara.wifi.get_wifi_channel();
+}
\ No newline at end of file
diff --git a/src/puara.h b/src/puara.h
index 343e41d..7695e29 100644
--- a/src/puara.h
+++ b/src/puara.h
@@ -10,6 +10,10 @@
 
 #include "puara_config.hpp"
 
+// the wifi type definitions (esp_wifi.h) are required for
+// wifi_second_chan_t and the WIFI_SECOND_CHAN_* constants.
+#include <esp_wifi.h>
+
 #include <string>
 #include <string_view>
 #include <functional>
@@ -53,6 +57,10 @@ class Puara
 
   double getVarNumber(std::string varName);
   std::string getVarText(std::string varName);
+
+  bool set_wifi_tx_power(int8_t max_tx_power);
+  bool set_wifi_channel(int8_t primary);
+  int8_t get_wifi_channel();
 };
 
 #endif
diff --git a/src/puara_wifi.cpp b/src/puara_wifi.cpp
index e83d28b..83d449b 100644
--- a/src/puara_wifi.cpp
+++ b/src/puara_wifi.cpp
@@ -32,6 +32,9 @@ void WiFi::wifi_init()
   wifi_init_config_t cfg = WIFI_INIT_CONFIG_DEFAULT();
   ESP_ERROR_CHECK(esp_wifi_init(&cfg));
 
+  esp_wifi_set_bandwidth(WIFI_IF_STA, WIFI_BW_HT20);
+  esp_wifi_set_bandwidth(WIFI_IF_AP, WIFI_BW_HT20);
+
   // Set device hostname
   esp_err_t setname = esp_netif_set_hostname(ap_netif, config.dmiName.c_str());
   if(setname != ESP_OK)
@@ -274,4 +277,54 @@ bool WiFi::get_StaIsConnected()
 {
   return StaIsConnected;
 }
+
+/*
+Set maximum transmitting power after WiFi start.
+Value will be mapped to the max_tx_power of the struct wifi_country_t.
+Param power unit is 0.25dBm
+Range is [8, 84] corresponding to 2dBm - 20dBm.
+Mapping Table {Power, max_tx_power} = {
+  {8, 2}, {20, 5}, {28, 7}, {34, 8}, {44, 11}, {52, 13}, 
+  {56, 14}, {60, 15}, {66, 16}, {72, 18}, {80, 20}   }
+*/
+bool WiFi::set_wifi_tx_power(int8_t max_tx_power) {
+    esp_err_t result = esp_wifi_set_max_tx_power(max_tx_power);
+    if(result == ESP_OK) {
+        return true;
+    } else {
+        ESP_LOGE(PUARA_TAG,"set_wifi_tx_power: Failed to set WiFi TX power. Error code: %d", result);
+        return false;
+    }
+}
+
+/*
+Set primary channel of device. Puara now uses HT20 as default
+primary --   for HT20, primary is the channel number  
+second --   for HT20, second is ignored, 
+The channel info set by this API will not be stored in NVS. 
+This function only works in AP mode, when no STAs are connected to it yet.
+Must be run at setup() after puara.start().
+*/
+bool WiFi::set_wifi_channel(int8_t primary) {
+    esp_err_t result = esp_wifi_set_channel(primary, WIFI_SECOND_CHAN_NONE);
+    if(result == ESP_OK) {
+        return true;
+    } else {
+        ESP_LOGE(PUARA_TAG,"set_wifi_channels: Failed to set WiFi channels. Error code: %s", esp_err_to_name(result));
+        return false;
+    }
+}
+
+int8_t WiFi::get_wifi_channel() {
+    int8_t primary;
+    wifi_second_chan_t second;
+    esp_err_t result = esp_wifi_get_channel((uint8_t*)&primary, &second);
+    if(result == ESP_OK) {
+        return primary;
+    } else {
+        ESP_LOGE(PUARA_TAG,"get_wifi_channels: Failed to get WiFi channels. Error code: %d", result);
+        return -1;
+    }
 }
+
+} // namespace PuaraAPI
diff --git a/src/puara_wifi.hpp b/src/puara_wifi.hpp
index a2974d3..34b893b 100644
--- a/src/puara_wifi.hpp
+++ b/src/puara_wifi.hpp
@@ -37,7 +37,10 @@ struct WiFi
   static void sta_event_handler(
       void* arg, esp_event_base_t event_base, int32_t event_id, void* event_data);
   void wifi_init();
-
+  bool set_wifi_tx_power(int8_t max_tx_power);
+  bool set_wifi_channel(int8_t primary);
+  int8_t get_wifi_channel();
+  
   const int wifi_connected_bit = BIT0;
   const int wifi_fail_bit = BIT1;
   EventGroupHandle_t s_wifi_event_group;
@@ -45,5 +48,6 @@ struct WiFi
   wifi_config_t wifi_config_sta;
   wifi_config_t wifi_config_ap;
   short int connect_counter;
+
 };
 } 
\ No newline at end of file