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**Note:** Even if 32kHz is selected in menuconfig, the system will fall back to the main XTAL if the external crystal is not detected during Bluetooth LE initialization. This may lead to unexpected current consumption in light-sleep mode.
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@@ -82,7 +82,7 @@ Selecting 136 kHz RC Oscillator
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To use a 136 kHz internal RC oscillator as the Bluetooth LE internal clock source, configure the following option:
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**Configuration Path:** `
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**Configuration Path 1:**
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`Component config → Bluetooth → Controller Options → MODEM SLEEP Options → Bluetooth modem sleep → Bluetooth Modem sleep Mode 1 → Bluetooth low power clock``
.. only:: esp32c2 or esp32c6 or esp32h2 or esp32c5 or esp32c61
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If low current consumption is required but have no access to the External 32kHz Crystal, then this clock source is recommended. However, selecting this clock source will have the sleep clock accuracy larger than 500 PPM, which is supported if the peer device is also an ESP chip. If the peer device is not an ESP chip, here's some Bluetooth LE event not supported:
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