diff --git a/partitions.csv b/partitions.csv
new file mode 100644
index 0000000..1de42b0
--- /dev/null
+++ b/partitions.csv
@@ -0,0 +1,6 @@
+# Name,      Type, SubType, Offset,   Size,     Flags
+nvs,         data, nvs,     0x9000,   0x6000,
+otadata,     data, ota,     0xF000,   0x2000,
+phy_init,    data, phy,     0x11000,  0x1000,
+ota_0,       app,  ota_0,   0x20000,  0x1E0000,
+ota_1,       app,  ota_1,   0x200000, 0x1E0000,
diff --git a/sdkconfig.defaults b/sdkconfig.defaults
index 2e30ed7..c07e02c 100644
--- a/sdkconfig.defaults
+++ b/sdkconfig.defaults
@@ -9,6 +9,12 @@ CONFIG_ESP_DEFAULT_CPU_FREQ_MHZ=160
 CONFIG_ESP_CONSOLE_USB_SERIAL_JTAG=y
 CONFIG_ESP_CONSOLE_SECONDARY_NONE=y
 
+# 4 MB flash with dual OTA application slots
+CONFIG_ESPTOOLPY_FLASHSIZE_4MB=y
+CONFIG_ESPTOOLPY_FLASHSIZE="4MB"
+CONFIG_PARTITION_TABLE_CUSTOM=y
+CONFIG_PARTITION_TABLE_CUSTOM_FILENAME="partitions.csv"
+
 # Wi-Fi station/provisioning support
 CONFIG_SYS_WIFI_ENABLED=y