drivers/radio/nrf24l01: Increase startup delay.

According to the datasheet of the NRF240L1 chip, 150 μs startup time is only acceptable when the chip is clocked externally. Most modules use crystal, which require 1.5 ms to settle. I think it's okay to wait more in both cases, for a reliable startup. Signed-off-by: Marcell Pünkösd <[email protected]>
micropython · Dec 30, 2024 · b9d9036 · b9d9036
1 parent e4cf095
commit b9d9036
Showing 1 changed file with 1 addition and 1 deletion.
diff --git a/micropython/drivers/radio/nrf24l01/nrf24l01.py b/micropython/drivers/radio/nrf24l01/nrf24l01.py
@@ -227,7 +227,7 @@ def send(self, buf, timeout=500):
     def send_start(self, buf):
         # power up
         self.reg_write(CONFIG, (self.reg_read(CONFIG) | PWR_UP) & ~PRIM_RX)
-        utime.sleep_us(150)
+        utime.sleep_us(1500)  # needs to be 1.5ms
         # send the data
         self.cs(0)
         self.spi.readinto(self.buf, W_TX_PAYLOAD)